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In almost every state, property tax assessments were higher in areas with more black and Hispanic residents

The gap between white families and minority households remains large — 10 percent — when you combine data for Hispanic and black families

“We’ve always considered that in addition to paying your regular tax, there was a black tax that goes along with it,”

“It’s almost like it’s in the soil,” he said. “It stretches all across the board. It’s not just real estate. It’s not just housing. It’s not just food deserts. It’s not just racism on the street. It’s not just that you can’t get a cab at night. It’s everything.”

“The structure of the property tax system operates to disadvantage black Americans,” she said. “That’s how structural racism is. It’s built into the system. The property tax system itself discriminates against black Americans.”

One in five black households have reported missing a mortgage payment since mid-March, compared with about 1 in 20 white ones

Facing the accumulated disadvantages of centuries of repression and systemic racism, black Americans are likely to earn less than similar white workers in lower-paying service jobs, a dynamic that makes it more difficult to buy a home. Now, by hitting those jobs first and hardest, the coronavirus pandemic has made a bad situation worse

“During the Jim Crow era, local white officials routinely manipulated property tax assessments to overburden and punish black populations and as a hidden tax break to landowning white gentry,”

white officials going to extreme lengths to hike black taxes. In one such case in 1932, a black North Carolina resident was taxed for the value of two stray dogs that had been seen on her property.

Many county assessors intentionally overvalued black properties, sometimes in direct retaliation for black political action

As early as 1901, W.E.B. Du Bois showed that because of their unequal tax burden, black people paid more in taxes than they received in public education funds,

The fiction that “black people take services but they don’t pay taxes” remains widespread,

The values of black-owned homes tend to grow more slowly than values of white-owned ones. The white people who make up the vast majority of home buyers tend to avoid black neighborhoods, which cuts black sellers off from many potential buyers.

Given that difference in price appreciation, if an assessor assumes a black-owned home gains value as quickly as a white-owned home, the assessed value of the black-owned home will quickly outstrip its market value.

Nearby white families benefit from the opposite trend: Their homes increase in value more rapidly than their assessments, giving them an ever-growing tax break.

the appeals process illustrates how much of the property tax system functions in a way that penalizes black wealth, even as it appears neutral on its face.

While neighborhood and race are the biggest drivers of the property tax gap, the economists found others

As part of their study, the economists reviewed 3.4 million property tax appeals from Chicago and surrounding Cook County and found black homeowners were significantly less likely to appeal their property tax assessments. When they did appeal, black homeowners were less likely to win. And when they won, they earned smaller assessment reductions.

“White people feel more comfortable working within the system that was set up to make them succeed,”

“It makes sense that a black family who has been disenfranchised from these systems wouldn’t challenge it.” It is also difficult to work within the system for Latinos, many of whom do not speak English as a first language, she added.

was not taught about appealing property taxes or any of the other small strategies white homeowners have used to accumulate generational wealth.

“They feel their property taxes were being used to push them out of their places, especially when communities started gentrifying,” Avenancio-León said. It helped him see how property taxation can be used as a means of social engineering.

the duo, then working on doctorate degrees at the University of California at Berkeley, combined 118 million real estate transactions and assessments from 2005 to 2016 with maps of more than 75,000 local taxing entities — such as counties, school districts, airport authorities and utility districts.

They used the maps to sort homes into areas that faced the same property tax burdens, identified the races of homeowners using federal mortgage data, and looked at every time a dwelling was assessed and then sold in the same year. That allowed them to compare a home’s assessed value and its market value, alongside the homeowner’s race and ethnicity.

The property tax gaps are worst for low earners, but even the highest-earning black Americans pay more on average in property taxes than similarly well-off white peers living nearby.

Whether or not these gaps were caused by explicit racism, Brown said, “you should be just as outraged that this is going on, and we should find a way to fix it.”

A new intelligence assessment of global trends projects that China will outstrip the United States as the leading economic power before 2030, but that America will remain an indispensable world leader

“The growth of the global middle class constitutes a tectonic shift,” the study says, adding that billions of people will gain new individual power as they climb out of poverty. “For the first time, a majority of the world’s population will not be impoverished, and the middle classes will be the most important social and economic sector in the vast majority of countries around the world.”

half of the world’s population will probably be living in areas that suffer from severe shortages of fresh water, meaning that management of natural resources will be a crucial component of global national security efforts.

terrorists could mount a computer-network attack in which the casualties would be measured not by the hundreds or thousands killed but by the millions severely affected by damaged infrastructure, like electrical grids being taken down.

At least 15 countries are “at high risk of state failure” by 2030, the report predicts, among them Afghanistan and Pakistan, but also Burundi, Rwanda, Somalia, Uganda and Yemen.

The best-case situation for global security until 2030, according to the study, would be a growing political partnership between the United States and China.

The worst-case situation envisions a stalling of economic globalization that would preclude advancement of financial well-being around the world. That would be a likely outcome after an outbreak of a health pandemic that, even if short-lived, would result in closed borders and economic isolationism.

Mr. Burrows noted that the audiences in China were far more accepting of the American intelligence assessments — both those predicting China’s economic ascendancy and those warning of political dangers if there was no reform of governance in Beijing — than were audiences in Russia.

To assess the validity of this study, the research and analysis team graded its past work on global trends, an effort undertaken every four years since 1996. Past studies, it found, underestimated the speed with which changes arrived on the global scene.

previous assessments should have paid greater attention to ideology.

The risk of conflict within a state — like a civil war or an insurgency — is expected to decline in Latin America, but will remain high in sub-Saharan Africa, in parts of the Middle East and South Asia, and in some Asia-Pacific island hot spots

Most worrisome — and already a part of the global security dynamic — is an assessment that future wars in Asia and the Middle East could include nuclear weapons.

Other important demographic trends will be aging populations in Europe, Japan, South Korea and Taiwan, which could slow their economies further

“the health of the global economy increasingly will be linked to how well the developing world does — more so than the traditional West.”

In addition to China, the developing nations that “will become especially important to the global economy” include Brazil, Colombia, India, Indonesia, Nigeria, South Africa and Turkey.

“The Afghan government will struggle to hold the Taliban at bay if the coalition withdraws support,” the report said.

Military and other officials who favored troops remaining in the country longer had used a similar classified intelligence assessment to argue for a slower drawdown, worried that an exit of American troops could trigger a wider civil war and an eventual return of terrorist groups.

The report released Tuesday did not contain an assessment of the likelihood of a return of Al Qaeda to Afghanistan, and some senior officials remain skeptical the Taliban would allow it.

Russia's actions are also "aimed at limiting the capabilities of the United States," the assessment said, "to ensure security on the European continent."

The assessment comes after three rounds of diplomatic talks between Russia and the West aimed at de-escalating the crisis failed to produce a resolution last week.

The new assessment also said Russia supports more than 35,000 rebels in eastern Ukraine and has about 3,000 of its own military personnel based in rebel territory. Moscow denies having any forces in eastern Ukraine.

As of mid-January, there are 36 Iskander launchers near Ukraine, according to the assessment.

US officials have said a Russian invasion of Ukraine could happen at any point in the next month or two.

it could signal the beginning of a new era of virtual assistants that will redefine our relationships with intelligent machines.

providing someone with valuable insights about their productivity, stress levels during meetings or lifestyle habits that impact their ability to perform their job

“We set out to discover whether there was a way to move the needle from an almost backward way of assessing people’s workplace performance to using more objective measures.

research shows that conscientious people, who are often more detailed-oriented and disciplined, tend to be more productive

If it was possible to predict someone’s mental health by analyzing their social media feeds and smartphone data, Campbell wondered, could similar data be leveraged to improve employee performance evaluations?

The workers were fitted with a wearable fitness tracker that monitored heart functions, sleep, stress, and measurements such as weight and calorie consumption, as well as a smartphone app that tracked their physical activity, location, phone usage and ambient light.

Location beacons placed in the home and office measured participants time at work and breaks from their desk, giving researchers a comprehensive window into their day from one hour to the next.

The information was processed by cloud-based machine-learning algorithms that classified performance using factors such as the amount of time spent at the workplace, quality of sleep, physical activity and phone usage

“We want to use that information to empower workers to tell them whether they’re being influenced by levels of stress or sleep or other factors that may not be immediately obvious to them.”

What the research does not explain, he said, is what habits make someone conscientious in the first place, leaving a gap in knowledge that researchers hoped to fill.

“Very often when people try to detect what drives performance, they rely on personality, which actually reveals little about someone’s ability to do their job well,” he said. “Evaluations can be biased because they are infused with stereotyping of people or political influences inside an office. But when you can extract a pattern over weeks and months, we can be more certain that assessment is objective and neutral.

the results showed, perhaps not surprisingly, that high performers tended to have lower rates of phone usage.

They also experience deeper periods of sustained sleep and are more physically active than their lower performing colleagues.

Researchers discovered that high-performing supervisors tended to be more mobile during the day, but they visited a smaller number of distinct places during their working hours

High-performing non-supervisors, meanwhile, tend to spend more time at work during the weekends,

Future versions, they said, could be tailored to individual jobs and provide workers with meaningful information about changes in their mental well-being during meetings or suggestions for reducing stress each week

But they also acknowledge that the valuable private data could prove volatile if it falls into a company’s hands without employee consent. Campbell suggested there might be a middle ground, such as companies offering incentives to employees who opt into a program that treats precise assessment data as one tool among several for evaluating performance.

“If there was any point down the road where I could have an application on my phone that could provide an objective assessment of my performance, that might be an incentive for workers to use it," he said. “Imagine being able to say, ‘Here’s the evidence that I deserve to be promoted or that my boss is standing in my way.’"

“I can’t really look into a crystal ball, but I’m hopeful this passive sensing technology will be used to empower the workforce rather than used against them," he added.

Security concerns, moreover, keep most information about stockpile purchases under wraps. Details about the contracts and inventory are rarely made public, and even the storage locations are secret.

Former Emergent employees, government contractors, members of Congress, biodefense experts and current and former officials from agencies that oversee the stockpile described a deeply dysfunctional system that contributed to the shocking shortages last year.

Purchases are supposed to be based on careful assessments by government officials of how best to save lives, but many have also been influenced by Emergent’s bottom line

The stockpile has long been the company’s biggest and most reliable customer for its anthrax vaccines, which expire and need to be replaced every few years.

In the two decades since the repository was created, Emergent’s aggressive tactics, broad political connections and penchant for undercutting competitors have given it remarkable sway over the government’s purchasing decisions related to the vaccines

While national security officials still consider anthrax a threat, it has not received specific mention since 2012 in the intelligence community’s annual public assessment of dangers facing the country, a report that has repeatedly warned of pandemics.

Emergent bought the license for the country’s only approved anthrax vaccine in 1998 from the State of Michigan. Over time, the price per dose the government agreed to pay Emergent increased nearly sixfold, accounting for inflation, contributing to record revenues last year that topped $1.5 billion

The company, whose board is stocked with former federal officials, has deployed a lobbying budget more typical of some big pharmaceutical companies

Competing efforts to develop a better and cheaper anthrax vaccine, for example, collapsed after Emergent outmaneuvered its rivals, the documents and interviews show.

preparations for an outbreak like Covid-19 almost always took a back seat to Emergent’s anthrax vaccines

the government approved a plan in 2015 to buy tens of millions of N95 respirators — lifesaving equipment for medical workers that has been in short supply because of Covid-19 — but the masks repeatedly lost out in the competition for funding over the years leading up to the pandemic

After Dr. Frieden and others in the Obama administration tried but failed to lessen Emergent’s dominance over stockpile purchases, the company’s fortunes rose under Mr. Trump, who appointed a former Emergent consultant with a background in bioterrorism to run the office that now oversees the stockpile

“If I could spend less on anthrax replenishment, I could buy more N95s,” Dr. Kadlec said in an interview shortly after leaving office. “I could buy more ventilators. I could buy more of other things that quite frankly I didn’t have the money to buy.”

And now, as some members of Congress push for larger reserves of ventilators, masks and other equipment needed in a pandemic, a trade group led in part by a top Emergent lobbyist has warned that the purchases could endanger companies focused on threats like anthrax and smallpox by drawing down limited funds.

Last year, as the pandemic raced across the country, the government paid Emergent $626 million for products that included vaccines to fight an entirely different threat: a terrorist attack using anthrax.

“I think it’s pretty clear that the benefit of the vaccine is marginal,” he said in an interview

“They’re very vicious in their behavior toward anybody they perceive as having a different point of view,” said Dr. Tara O’Toole, a former Homeland Security official who says she ran afoul of Emergent in 2010 after telling Congress that the nation needed a newer and better anthrax vaccine.

That year, the company that would become Emergent — then known as BioPort — paid Michigan $25 million to buy the license for a government-developed anthrax vaccine and an aging manufacturing plant.

The company opened its doors with one product, called BioThrax, and one customer, the Defense Department, which required the vaccine for service members.

Emergent’s anthrax vaccine was not the government’s first choice. It was more than 30 years old and plagued by manufacturing challenges and complaints about side effects. Officials instead backed a company named VaxGen, which was developing a vaccine using newer technology licensed from the military.

Emergent’s successful campaign against VaxGen — deploying a battalion of lobbyists, publicly attacking its rival and warning that it might cease production of its own vaccine if the government didn’t buy it — established its formidable reputation. By 2006, VaxGen had lost its contract and the government had turned to Emergent to supply BioThrax.

“They were totally feared by everybody,” Dr. Philip Russell, a top health official in the administration of President George W. Bush, said in an interview. He said that he clashed with Emergent when he backed VaxGen, and that his reputation came under attack, which was documented by The Times in 2006. (Dr. Russell died this January.)

the group of federal officials who make decisions about the stockpile and other emergency preparations — known as the Phemce, for the Public Health Emergency Medical Countermeasures Enterprise — ordered up a study. It found in 2010 that the government could not afford to devote so much of its budget to a single threat.

Instead, the review concluded, the government should invest more in products with multiple applications, like diagnostic tests, ventilators, reusable respirator masks and “plug and play” platforms that can rapidly develop vaccines for a range of outbreaks.

from 2010 through 2018, the anthrax vaccine consumed more than 40 percent of the stockpile’s budget, which averaged $560 million during those years.

Emergent and the government have withheld details of the stockpile contracts, including how much the company has charged for each dose of BioThrax, but executives have shared some of the missing information with investors.

The company in 1998 agreed to charge the government an average of about $3.35 per dose, documents show. By 2010, the price had risen to about $28, according to financial disclosures and statements by Emergent executives, and now it is about $30

Over the past 15 years, the company recorded a gross profit margin of about 75 percent for the vaccine, in an arrangement that one Emergent vice president called a “monopoly.”

Emergent’s rise is the stuff of lore in biodefense circles — a tale of savvy dealings, fortuitous timing and tough, competitive tactics.

One afternoon in October 2010, Wall Street investors gathered at the Millennium Broadway Hotel in Manhattan for a presentation by Mr. Burrows. He shared with them a secret number: 75 million.That was how many BioThrax doses the government had committed to stockpiling, and it was the backbone of Emergent’s thriving business. In pursuit of that goal, the government had already spent more than $900 million, and it continued to buy virtually every dose Emergent could produce. It had even awarded the company more than $100 million to expand its Michigan factory.

“The best approach toward anthrax is antimicrobial therapy,” Dr. Anthony S. Fauci, the government’s top infectious-disease expert, told Congress as early as 2007.

In an analysis published in 2007, the firm determined that giving antibiotics immediately after a large outdoor anthrax attack was likely to reduce serious illnesses by more than 80 percent. Administering the vaccine would then cut serious illnesses only by an additional 4 percent.

Dr. Ali S. Khan, who ran the C.D.C. office managing the stockpile until 2014, said bluntly: “We overpaid.”

“A bunch of people, including myself, were sitting in a room and asking what kind of attack might happen,” said Dr. Kenneth Bernard, a top biodefense adviser to Mr. Bush, recalling a meeting in the months after the 2001 attacks.

“And somebody said, ‘Well, I can’t imagine anyone attacking more than three cities at once,’” he said. “So we took the population of a major U.S. city and multiplied by three.”

A team of Homeland Security and health officials began doing just that in 2013. The group determined, in a previously undisclosed analysis, that the government could stockpile less BioThrax and still be prepared for a range of plausible attacks, according to two people involved in the assessment. Separately, government researchers concluded that two doses of BioThrax provided virtually the same protection as three.

the National Intelligence Council, which helped draft the assessments during Mr. Obama’s second term, said in an interview that the idea of a three-city attack affecting 25 million people was “straining credulity.”

“If you talk to the head of the House Intelligence Committee,” Don Elsey, Emergent’s chief financial officer, told investors in 2011, “and you say, ‘What are you most worried about?’ he’ll say, ‘Let me see: Number one, anthrax; number two, anthrax; number three, anthrax.’”

Emergent’s sales strategy was to address that fear by promising the federal government peace of mind with its vaccine.

“There’s a political element involved,” Mr. Burrows, the company’s vice president of investor relations, said at an industry conference in 2016. “I don’t have a marketing expense. I have lobbying expense.”

Since 2010, the company has spent an average of $3 million a year on lobbying — far outspending similarly sized biotech firms, and roughly matching the outlays of two pharmaceutical companies with annual revenues at least 17 times greater, AstraZeneca and Bristol Myers Squibb

In 2015, as stockpile managers questioned the large purchases of BioThrax, the spending topped $4 million

“They were pouring it on — how poor they were and how this was going to ruin the company, and they’d have to close down factories, and America was going to be left without anthrax vaccine,”

“Their revolving door is moving at 60 miles per hour,” said former Senator Claire McCaskill, a Democrat from Missouri who had questioned spending on the vaccine while in the Senate. “There is really a lot of incestuousness because it’s such a specialized field.”

Ms. DeLorenzo, the Emergent spokeswoman, said the lobbying was necessary because government investment “in biodefense and other public health threats has not been as strongly prioritized as it should be.”

Over the past 10 years, Emergent’s political action committee has spread almost $1.4 million in campaign contributions among members of both partie

The move followed a yearslong pattern of retaining a bipartisan lobbying corps of former agency officials, staff members and congressmen, including Pete Hoekstra of Michigan, Tom Latham of Iowa and Jim Saxton of New Jersey.

“You have people coming and saying, ‘There’s no market for this — nobody’s going to produce this unless you buy enough of it to keep the production line open,’” he said. “It’s an absolutely appropriate argument to make.”

Emergent’s campaign proved effective. Despite the 2015 recommendation by the stockpile managers, Senate overseers made clear they opposed the reduction, and the government went ahead and bought $300 million worth of BioThrax.

Emergent executives, meanwhile, warned that there could be job losses at the factory in Lansing, Mich. — the capital of a swing state at the center of a contentious presidential campaign between Mr. Trump and Hillary Clinton.

Because Emergent was the sole manufacturer of a product deemed critical to national security, the company has played what one former executive described to The Times as “the we’re-going-to-go-bankrupt card.”

Dr. Hatchett said the idea gave him pause. But, he explained in an interview, “if there’s only one partner that can provide a product and only one customer for that product, the customer needs the partner to survive.”

Just a year later, Emergent spent about $200 million in cash, and made other financial commitments, to acquire Sanofi’s smallpox vaccine and GlaxoSmithKline’s anthrax treatment, two products with established pipelines to the stockpile. The purchases expanded Emergent’s hold over the reserve.

Ms. DeLorenzo said the acquisitions did not suggest the company was better off than it had claimed, but Dr. Bright said he and others involved in the bailout felt used.

a plan five years earlier to create an emergency supply of N95 respirators was simply not funded. A team of experts had proposed buying tens of millions of the masks to fill the gap during an outbreak until domestic manufacturing could ramp up, according to five officials involved in the assessment, which has not been previously disclosed.

By the time the novel coronavirus emerged, the stockpile had only 12 million of the respirators. The stockpile has since set a goal of amassing 300 million.

Dr. Kadlec, the Trump administration official overseeing the stockpile, said he used the previous administration’s mask recommendation to raise alarms as early as 2018.

Dr. Annie De Groot, chief executive of the small vaccine company EpiVax, spoke about the need to break Emergent’s lock on research dollars at a biodefense forum in 2015.

“Politicians want to look like they’ve addressed the problem,” she said. “But we need to actually listen to the scientists.”

Over the last five years, Emergent has received nearly a half-billion dollars in federal research and development funding, the company said in its financial disclosures.

“We know ahead of time when funding opportunities are going to come out,” Barbara Solow, a senior vice president, told investors in 2017. “When we talk to the government, we know how to speak the government’s language around contracting.”

The company used federal money to make improvements to BioThrax, and also found a way to earn government money from a competing anthrax vaccine it had excoriated. After the demise of VaxGen in 2006, Emergent bought the company’s unfinished vaccine and in 2010 persuaded the federal government to continue paying for research on it

By the time the research contract was canceled in 2016, Emergent had collected about $85 million, records show. The company then shelved the vaccine. “If the U.S. government withdraws funding, we re-evaluate whether there is any business case for continuing,” Ms. DeLorenzo said.

For more than 30 years, the government had been encouraging the development of a BioThrax replacement. In 2002, the Institute of Medicine had concluded that an alternative based on more modern technology was “urgently needed.” By 2019, there were three leading candidates, including one made by Emergent, known as AV7909.

Emergent’s candidate was hardly the breakthrough the government was seeking, former health officials said. AV7909 was essentially an enhanced version of BioThrax. The competitors were using more modern technology that could produce doses more rapidly and consistently, and were promising significant cost savings for the stockpile.

To qualify for emergency authorization, a vaccine must be at an advanced stage of development with no approved alternatives. Emergent acknowledged in its financial disclosures that there was “considerable uncertainty” whether the new vaccine met those requirements.

The election of Mr. Trump as president was good news for Emergent.

Dr. Lurie, the senior health official in the Obama administration who had tried to scale back BioThrax purchases, was out. Mr. Trump’s pick to replace her was Dr. Kadlec, a career Air Force physician and top biodefense official in the Bush administration who was fixated on bioterrorism threats, especially anthrax, current and former officials said

Soon after entering the Trump administration in 2017, Dr. Kadlec took a series of actions that he characterized as streamlining a cumbersome bureaucracy but that had the effect of benefiting Emergent.

He assumed greater control of purchasing decisions, diminishing the authority of the Phemce, the oversight group that had proposed buying less BioThrax. And in 2018, he backed a decision to move control of the stockpile to his office in the Department of Health and Human Services and away from the C.D.C., which is based in Atlanta and prides itself on being insulated from the influence of lobbyists.

Dr. Frieden, the former C.D.C. director, was strongly opposed. The move, he said, “had almost as an explicit goal to give the lobbyists more say in what got purchased.”

That July, the government made the announcement Emergent had been banking on, committing to buying millions of doses. Separately, it said it would stop funding Emergent’s competitors.

The decision to side with Emergent did not surprise Dr. Khan, the former C.D.C. official overseeing the stockpile.“Again and again, we seem unable to move past an old technology that’s bankrupting the stockpile,” he said.

Last month, as the death toll from Covid-19 neared a half-million, Mr. Kramer, the company’s chief executive, told analysts there had been no “evidence of a slowdown or a delay or a deprioritization,” and echoed a statement he had made in April when asked whether the pandemic might interrupt Emergent’s sales to the stockpile.“It’s pretty much business as usual,” he said then.

The organizers assessed skills in literacy and facility with basic math, or numeracy, in all 23 countries. In 19 countries, there was a third assessment, called “problem-solving in technology-rich environments,” on using digital devices to find and evaluate information, communicate, and perform common tasks.

In all three fields, Japan ranked first and Finland second in average scores, with the Netherlands, Sweden and Norway near the top. Spain, Italy and France were at or near the bottom in literacy and numeracy, and were not included in the technology assessment.

The United States ranked near the middle in literacy and near the bottom in skill with numbers and technology. In number skills, just 9 percent of Americans scored in the top two of five proficiency levels, compared with a 23-country average of 12 percent, and 19 percent in Finland, Japan and Sweden.

“Our economic advantage has been having high skill levels at the top, being big, being more flexible than the other economies, and being able to attract other countries’ most skilled labor. But that advantage is slipping.”

Compared with other countries with similar average scores, the United States, in all three assessments, usually had more people in the highest proficiency levels, and more in the lowest. The country also had an unusually wide gap in skills between the employed and the unemployed.

In the most highly educated population, people with graduate and professional degrees, Americans lagged slightly behind the international averages in skills. But the gap was widest at the bottom; among those who did not finish high school, Americans had significantly worse skills than their counterparts abroad.

Among 55- to 65-year-olds, the United States fared better, on the whole, than its counterparts. But in the 45-to-54 age group, American performance was average, and among younger people, it was behind.

Facebook also assumed extraordinary power over the personal information of its 2.2 billion users — control it has wielded with little transparency or outside oversight.

The partnerships were so important that decisions about forming them were vetted at high levels, sometimes by Mr. Zuckerberg and Sheryl Sandberg, the chief operating officer, Facebook officials said. While many of the partnerships were announced publicly, the details of the sharing arrangements typically were confidential

Zuckerberg, the chief executive, assured lawmakers in April that people “have complete control” over everything they share on Facebook.

the documents, as well as interviews with about 50 former employees of Facebook and its corporate partners, reveal that Facebook allowed certain companies access to data despite those protections

Data privacy experts disputed Facebook’s assertion that most partnerships were exempted from the regulatory requirements

“This is just giving third parties permission to harvest data without you being informed of it or giving consent to it,” said David Vladeck, who formerly ran the F.T.C.’s consumer protection bureau. “I don’t understand how this unconsented-to data harvesting can at all be justified under the consent decree.

“I don’t believe it is legitimate to enter into data-sharing partnerships where there is not prior informed consent from the user,” said Roger McNamee, an early investor in Facebook. “No one should trust Facebook until they change their business model.”

Few companies have better data than Facebook and its rival, Google, whose popular products give them an intimate view into the daily lives of billions of people — and allow them to dominate the digital advertising market

Facebook has never sold its user data, fearful of user backlash and wary of handing would-be competitors a way to duplicate its most prized asset. Instead, internal documents show, it did the next best thing: granting other companies access to parts of the social network in ways that advanced its own interests.

as the social network has disclosed its data sharing deals with other kinds of businesses — including internet companies such as Yahoo — Facebook has labeled them integration partners, too

Among the revelations was that Facebook obtained data from multiple partners for a controversial friend-suggestion tool called “People You May Know.”

The feature, introduced in 2008, continues even though some Facebook users have objected to it, unsettled by its knowledge of their real-world relationships. Gizmodo and other news outlets have reported cases of the tool’s recommending friend connections between patients of the same psychiatrist, estranged family members, and a harasser and his victim.

The social network permitted Amazon to obtain users’ names and contact information through their friends, and it let Yahoo view streams of friends’ posts as recently as this summer, despite public statements that it had stopped that type of sharing years earlier.

agreements with about a dozen companies did. Some enabled partners to see users’ contact information through their friends — even after the social network, responding to complaints, said in 2014 that it was stripping all applications of that power.

Pam Dixon, executive director of the World Privacy Forum, a nonprofit privacy research group, said that Facebook would have little power over what happens to users’ information after sharing it broadly. “It travels,” Ms. Dixon said. “It could be customized. It could be fed into an algorithm and decisions could be made about you based on that data.”

Facebook’s agreement with regulators is a result of the company’s early experiments with data sharing. In late 2009, it changed the privacy settings of the 400 million people then using the service, making some of their information accessible to all of the internet. Then it shared that information, including users’ locations and religious and political leanings, with Microsoft and other partners.

But the privacy program faced some internal resistance from the start, according to four former Facebook employees with direct knowledge of the company’s efforts. Some engineers and executives, they said, considered the privacy reviews an impediment to quick innovation and growth. And the core team responsible for coordinating the reviews — numbering about a dozen people by 2016 — was moved around within Facebook’s sprawling organization, sending mixed signals about how seriously the company took it, the ex-employees said.

Microsoft officials said that Bing was using the data to build profiles of Facebook users on Microsoft servers. They declined to provide details, other than to say the information was used in “feature development” and not for advertising. Microsoft has since deleted the data, the officials said.

For some advocates, the torrent of user data flowing out of Facebook has called into question not only Facebook’s compliance with the F.T.C. agreement, but also the agency’s approach to privacy regulation.

“We brought Facebook under the regulatory authority of the F.T.C. after a tremendous amount of work. The F.T.C. has failed to act.

Facebook, in turn, used contact lists from the partners, including Amazon, Yahoo and the Chinese company Huawei — which has been flagged as a security threat by American intelligence officials — to gain deeper insight into people’s relationships and suggest more connections, the records show.

Facebook records show Yandex had access in 2017 to Facebook’s unique user IDs even after the social network stopped sharing them with other applications, citing privacy risks. A spokeswoman for Yandex, which was accused last year by Ukraine’s security service of funneling its user data to the Kremlin, said the company was unaware of the access

In October, Facebook said Yandex was not an integration partner. But in early December, as The Times was preparing to publish this article, Facebook told congressional lawmakers that it was

But federal regulators had reason to know about the partnerships — and to question whether Facebook was adequately safeguarding users’ privacy. According to a letter that Facebook sent this fall to Senator Ron Wyden, the Oregon Democrat, PricewaterhouseCoopers reviewed at least some of Facebook’s data partnerships.

The first assessment, sent to the F.T.C. in 2013, found only “limited” evidence that Facebook had monitored those partners’ use of data. The finding was redacted from a public copy of the assessment, which gave Facebook’s privacy program a passing grade over all.

Mr. Wyden and other critics have questioned whether the assessments — in which the F.T.C. essentially outsources much of its day-to-day oversight to companies like PricewaterhouseCoopers — are effective. As with other businesses under consent agreements with the F.T.C., Facebook pays for and largely dictated the scope of its assessments, which are limited mostly to documenting that Facebook has conducted the internal privacy reviews it claims it had

Facebook officials said that while the social network audited partners only rarely, it managed them closely.

If the world had adopted the proposal widely endorsed at the end of the ’80s — a freezing of carbon emissions, with a reduction of 20 percent by 2005 — warming could have been held to less than 1.5 degrees.

Action had to be taken, and the United States would need to lead. It didn’t.

There can be no understanding of our current and future predicament without understanding why we failed to solve this problem when we had the chance.

The first suggestion to Rafe Pomerance that humankind was destroying the conditions necessary for its own survival came on Page 66 of the government publication EPA-600/7-78-019. It was a technical report about coal

‘This Is the Whole Banana’ Spring 1979

here was an urgent problem that demanded their attention, MacDonald believed, because human civilization faced an existential crisis. In “How to Wreck the Environment,” a 1968 essay published while he was a science adviser to Lyndon Johnson, MacDonald predicted a near future in which “nuclear weapons were effectively banned and the weapons of mass destruction were those of environmental catastrophe.” One of the most potentially devastating such weapons, he believed, was the gas that we exhaled with every breath: carbon dioxide. By vastly increasing carbon emissions, the world’s most advanced militaries could alter weather patterns and wreak famine, drought and economic collapse.

the Jasons. They were like one of those teams of superheroes with complementary powers that join forces in times of galactic crisis. They had been brought together by federal agencies, including the C.I.A, to devise scientific solutions to national-security problems: how to detect an incoming missile; how to predict fallout from a nuclear bomb; how to develop unconventional weapons, like plague-infested rats.

Agle pointed to an article about a prominent geophysicist named Gordon MacDonald, who was conducting a study on climate change with the Jasons, the mysterious coterie of elite scientists to which he belonged

During the spring of 1977 and the summer of 1978, the Jasons met to determine what would happen once the concentration of carbon dioxide in the atmosphere doubled from pre-Industrial Revolution levels. It was an arbitrary milestone, the doubling, but a useful one, as its inevitability was not in question; the threshold would most likely be breached by 2035.

The Jasons’ report to the Department of Energy, “The Long-Term Impact of Atmospheric Carbon Dioxide on Climate,” was written in an understated tone that only enhanced its nightmarish findings: Global temperatures would increase by an average of two to three degrees Celsius; Dust Bowl conditions would “threaten large areas of North America, Asia and Africa”; access to drinking water and agricultural production would fall, triggering mass migration on an unprecedented scale. “Perhaps the most ominous feature,” however, was the effect of a changing climate on the poles. Even a minimal warming “could lead to rapid melting” of the West Antarctic ice sheet. The ice sheet contained enough water to raise the level of the oceans 16 feet.

MacDonald explained that he first studied the carbon-dioxide issue when he was about Pomerance’s age — in 1961, when he served as an adviser to John F. Kennedy. Pomerance pieced together that MacDonald, in his youth, had been something of a prodigy: In his 20s, he advised Dwight D. Eisenhower on space exploration; at 32, he became a member of the National Academy of Sciences; at 40, he was appointed to the inaugural Council on Environmental Quality, where he advised Richard Nixon on the environmental dangers of burning coal. He monitored the carbon-dioxide problem the whole time, with increasing alarm.

They were surprised to learn how few senior officials were familiar with the Jasons’ findings, let alone understood the ramifications of global warming. At last, having worked their way up the federal hierarchy, the two went to see the president’s top scientist, Frank Press.

Thus began the Gordon and Rafe carbon-dioxide roadshow. Beginning in the spring of 1979, Pomerance arranged informal briefings with the E.P.A., the National Security Council, The New York Times, the Council on Environmental Quality and the Energy Department, which, Pomerance learned, had established an Office of Carbon Dioxide Effects two years earlier at MacDonald’s urging

. Out of respect for MacDonald, Press had summoned to their meeting what seemed to be the entire senior staff of the president’s Office of Science and Technology Policy — the officials consulted on every critical matter of energy and national security. What Pomerance had expected to be yet another casual briefing assumed the character of a high-level national-security meeting.

MacDonald would begin his presentation by going back more than a century to John Tyndall — an Irish physicist who was an early champion of Charles Darwin’s work and died after being accidentally poisoned by his wife. In 1859, Tyndall found that carbon dioxide absorbed heat and that variations in the composition of the atmosphere could create changes in climate. These findings inspired Svante Arrhenius, a Swedish chemist and future Nobel laureate, to deduce in 1896 that the combustion of coal and petroleum could raise global temperatures. This warming would become noticeable in a few centuries, Arrhenius calculated, or sooner if consumption of fossil fuels continued to increase.

Four decades later, a British steam engineer named Guy Stewart Callendar discovered that, at the weather stations he observed, the previous five years were the hottest in recorded history. Humankind, he wrote in a paper, had become “able to speed up the processes of Nature.” That was in 1939.

MacDonald’s history concluded with Roger Revelle, perhaps the most distinguished of the priestly caste of government scientists who, since the Manhattan Project, advised every president on major policy; he had been a close colleague of MacDonald and Press since they served together under Kennedy. In a 1957 paper written with Hans Suess, Revelle concluded that “human beings are now carrying out a large-scale geophysical experiment of a kind that could not have happened in the past nor be reproduced in the future.” Revelle helped the Weather Bureau establish a continuous measurement of atmospheric carbon dioxide at a site perched near the summit of Mauna Loa on the Big Island of Hawaii, 11,500 feet above the sea — a rare pristine natural laboratory on a planet blanketed by fossil-fuel emissions.

After nearly a decade of observation, Revelle had shared his concerns with Lyndon Johnson, who included them in a special message to Congress two weeks after his inauguration. Johnson explained that his generation had “altered the composition of the atmosphere on a global scale” through the burning of fossil fuels, and his administration commissioned a study of the subject by his Science Advisory Committee. Revelle was its chairman, and its 1965 executive report on carbon dioxide warned of the rapid melting of Antarctica, rising seas, increased acidity of fresh waters — changes that would require no less than a coordinated global effort to forestall.Yet emissions continued to rise, and at this rate, MacDonald warned, they could see a snowless New England, the swamping of major coastal cities, as much as a 40 percent decline in national wheat production, the forced migration of about one-quarter of the world’s population. Not within centuries — within their own lifetimes.

On May 22, Press wrote a letter to the president of the National Academy of Sciences requesting a full assessment of the carbon-dioxide issue. Jule Charney, the father of modern meteorology, would gather the nation’s top oceanographers, atmospheric scientists and climate modelers to judge whether MacDonald’s alarm was justified — whether the world was, in fact, headed to cataclysm.

If Charney’s group confirmed that the world was careering toward an existential crisis, the president would be forced to act.

Hansen turned from the moon to Venus. Why, he tried to determine, was its surface so hot? In 1967, a Soviet satellite beamed back the answer: The planet’s atmosphere was mainly carbon dioxide. Though once it may have had habitable temperatures, it was believed to have succumbed to a runaway greenhouse effect: As the sun grew brighter, Venus’s ocean began to evaporate, thickening the atmosphere, which forced yet greater evaporation — a self-perpetuating cycle that finally boiled off the ocean entirely and heated the planet’s surface to more than 800 degrees Fahrenheit

At the other extreme, Mars’s thin atmosphere had insufficient carbon dioxide to trap much heat at all, leaving it about 900 degrees colder. Earth lay in the middle, its Goldilocks greenhouse effect just strong enough to support life.

We want to learn more about Earth’s climate, Jim told Anniek — and how humanity can influence it. He would use giant new supercomputers to map the planet’s atmosphere. They would create Mirror Worlds: parallel realities that mimicked our own. These digital simulacra, technically called “general circulation models,” combined the mathematical formulas that governed the behavior of the sea, land and sky into a single computer model. Unlike the real world, they could be sped forward to reveal the future.

The government officials, many of them scientists themselves, tried to suppress their awe of the legends in their presence: Henry Stommel, the world’s leading oceanographer; his protégé, Carl Wunsch, a Jason; the Manhattan Project alumnus Cecil Leith; the Harvard planetary physicist Richard Goody. These were the men who, in the last three decades, had discovered foundational principles underlying the relationships among sun, atmosphere, land and ocean — which is to say, the climate.

When, at Charney’s request, Hansen programmed his model to consider a future of doubled carbon dioxide, it predicted a temperature increase of four degrees Celsius. That was twice as much warming as the prediction made by the most prominent climate modeler, Syukuro Manabe, whose government lab at Princeton was the first to model the greenhouse effect. The difference between the two predictions — between warming of two degrees Celsius and four degrees Celsius — was the difference between damaged coral reefs and no reefs whatsoever, between thinning forests and forests enveloped by desert, between catastrophe and chaos.

The discrepancy between the models, Arakawa concluded, came down to ice and snow. The whiteness of the world’s snowfields reflected light; if snow melted in a warmer climate, less radiation would escape the atmosphere, leading to even greater warming. Shortly before dawn, Arakawa concluded that Manabe had given too little weight to the influence of melting sea ice, while Hansen had overemphasized it. The best estimate lay in between. Which meant that the Jasons’ calculation was too optimistic. When carbon dioxide doubled in 2035 or thereabouts, global temperatures would increase between 1.5 and 4.5 degrees Celsius, with the most likely outcome a warming of three degrees.

within the highest levels of the federal government, the scientific community and the oil-and-gas industry — within the commonwealth of people who had begun to concern themselves with the future habitability of the planet — the Charney report would come to have the authority of settled fact. It was the summation of all the predictions that had come before, and it would withstand the scrutiny of the decades that followed it. Charney’s group had considered everything known about ocean, sun, sea, air and fossil fuels and had distilled it to a single number: three. When the doubling threshold was broached, as appeared inevitable, the world would warm three degrees Celsius

The last time the world was three degrees warmer was during the Pliocene, three million years ago, when beech trees grew in Antarctica, the seas were 80 feet higher and horses galloped across the Canadian coast of the Arctic Ocean.

After the publication of the Charney report, Exxon decided to create its own dedicated carbon-dioxide research program, with an annual budget of $600,000. Only Exxon was asking a slightly different question than Jule Charney. Exxon didn’t concern itself primarily with how much the world would warm. It wanted to know how much of the warming Exxon could be blamed for.

“It behooves us to start a very aggressive defensive program,” Shaw wrote in a memo to a manager, “because there is a good probability that legislation affecting our business will be passed.”

Shaw turned to Wallace Broecker, a Columbia University oceanographer who was the second author of Roger Revelle’s 1965 carbon-dioxide report for Lyndon Johnson. In 1977, in a presentation at the American Geophysical Union, Broecker predicted that fossil fuels would have to be restricted, whether by taxation or fiat. More recently, he had testified before Congress, calling carbon dioxide “the No.1 long-term environmental problem.” If presidents and senators trusted Broecker to tell them the bad news, he was good enough for Exxon.

The company had been studying the carbon-dioxide problem for decades, since before it changed its name to Exxon. In 1957, scientists from Humble Oil published a study tracking “the enormous quantity of carbon dioxide” contributed to the atmosphere since the Industrial Revolution “from the combustion of fossil fuels.” Even then, the observation that burning fossil fuels had increased the concentration of carbon in the atmosphere was well understood and accepted by Humble’s scientists.

The American Petroleum Institute, the industry’s largest trade association, asked the same question in 1958 through its air-pollution study group and replicated the findings made by Humble Oil. So did another A.P.I. study conducted by the Stanford Research Institute a decade later, in 1968, which concluded that the burning of fossil fuels would bring “significant temperature changes” by the year 2000 and ultimately “serious worldwide environmental changes,” including the melting of the Antarctic ice cap and rising seas.

The ritual repeated itself every few years. Industry scientists, at the behest of their corporate bosses, reviewed the problem and found good reasons for alarm and better excuses to do nothing. Why should they act when almost nobody within the United States government — nor, for that matter, within the environmental movement — seemed worried?

Why take on an intractable problem that would not be detected until this generation of employees was safely retired? Worse, the solutions seemed more punitive than the problem itself. Historically, energy use had correlated to economic growth — the more fossil fuels we burned, the better our lives became. Why mess with that?

That June, Jimmy Carter signed the Energy Security Act of 1980, which directed the National Academy of Sciences to start a multiyear, comprehensive study, to be called “Changing Climate,” that would analyze social and economic effects of climate change. More urgent, the National Commission on Air Quality, at the request of Congress, invited two dozen experts, including Henry Shaw himself, to a meeting in Florida to propose climate policy.

On April 3, 1980, Senator Paul Tsongas, a Massachusetts Democrat, held the first congressional hearing on carbon-dioxide buildup in the atmosphere. Gordon MacDonald testified that the United States should “take the initiative” and develop, through the United Nations, a way to coordinate every nation’s energy policies to address the problem.

During the expansion of the Clean Air Act, he pushed for the creation of the National Commission on Air Quality, charged with ensuring that the goals of the act were being met. One such goal was a stable global climate. The Charney report had made clear that goal was not being met, and now the commission wanted to hear proposals for legislation. It was a profound responsibility, and the two dozen experts invited to the Pink Palace — policy gurus, deep thinkers, an industry scientist and an environmental activist — had only three days to achieve it, but the utopian setting made everything seem possible

We have less time than we realize, said an M.I.T. nuclear engineer named David Rose, who studied how civilizations responded to large technological crises. “People leave their problems until the 11th hour, the 59th minute,” he said. “And then: ‘Eloi, Eloi, Lama Sabachthani?’ ” — “My God, my God, why hast thou forsaken me?”

The attendees seemed to share a sincere interest in finding solutions. They agreed that some kind of international treaty would ultimately be needed to keep atmospheric carbon dioxide at a safe level. But nobody could agree on what that level was.

William Elliott, a NOAA scientist, introduced some hard facts: If the United States stopped burning carbon that year, it would delay the arrival of the doubling threshold by only five years. If Western nations somehow managed to stabilize emissions, it would forestall the inevitable by only eight years. The only way to avoid the worst was to stop burning coal. Yet China, the Soviet Union and the United States, by far the world’s three largest coal producers, were frantically accelerating extraction.

“Do we have a problem?” asked Anthony Scoville, a congressional science consultant. “We do, but it is not the atmospheric problem. It is the political problem.” He doubted that any scientific report, no matter how ominous its predictions, would persuade politicians to act.

The talk of ending oil production stirred for the first time the gentleman from Exxon. “I think there is a transition period,” Henry Shaw said. “We are not going to stop burning fossil fuels and start looking toward solar or nuclear fusion and so on. We are going to have a very orderly transition from fossil fuels to renewable energy sources.”

What if the problem was that they were thinking of it as a problem? “What I am saying,” Scoville continued, “is that in a sense we are making a transition not only in energy but the economy as a whole.” Even if the coal and oil industries collapsed, renewable technologies like solar energy would take their place. Jimmy Carter was planning to invest $80 billion in synthetic fuel. “My God,” Scoville said, “with $80 billion, you could have a photovoltaics industry going that would obviate the need for synfuels forever!”

nobody could agree what to do. John Perry, a meteorologist who had worked as a staff member on the Charney report, suggested that American energy policy merely “take into account” the risks of global warming, though he acknowledged that a nonbinding measure might seem “intolerably stodgy.” “It is so weak,” Pomerance said, the air seeping out of him, “as to not get us anywhere.”

Scoville pointed out that the United States was responsible for the largest share of global carbon emissions. But not for long. “If we’re going to exercise leadership,” he said, “the opportunity is now.

One way to lead, he proposed, would be to classify carbon dioxide as a pollutant under the Clean Air Act and regulate it as such. This was received by the room like a belch. By Scoville’s logic, every sigh was an act of pollution. Did the science really support such an extreme measure? The Charney report did exactly that, Pomerance said.

Slade, the director of the Energy Department’s carbon-dioxide program, considered the lag a saving grace. If changes did not occur for a decade or more, he said, those in the room couldn’t be blamed for failing to prevent them. So what was the problem?

“Call it whatever.” Besides, Pomerance added, they didn’t have to ban coal tomorrow. A pair of modest steps could be taken immediately to show the world that the United States was serious: the implementation of a carbon tax and increased investment in renewable energy. Then the United States could organize an international summit meeting to address climate change

these two dozen experts, who agreed on the major points and had made a commitment to Congress, could not draft a single paragraph. Hours passed in a hell of fruitless negotiation, self-defeating proposals and impulsive speechifying. Pomerance and Scoville pushed to include a statement calling for the United States to “sharply accelerate international dialogue,” but they were sunk by objections and caveats.

They never got to policy proposals. They never got to the second paragraph. The final statement was signed by only the moderator, who phrased it more weakly than the declaration calling for the workshop in the first place. “The guide I would suggest,” Jorling wrote, “is whether we know enough not to recommend changes in existing policy.”

Pomerance had seen enough. A consensus-based strategy would not work — could not work — without American leadership. And the United States wouldn’t act unless a strong leader persuaded it to do so — someone who would speak with authority about the science, demand action from those in power and risk everything in pursuit of justice.

The meeting ended Friday morning. On Tuesday, four days later, Ronald Reagan was elected president.

‘Otherwise, They’ll Gurgle’ November 1980-September 1981

In the midst of this carnage, the Council on Environmental Quality submitted a report to the White House warning that fossil fuels could “permanently and disastrously” alter Earth’s atmosphere, leading to “a warming of the Earth, possibly with very serious effects.” Reagan did not act on the council’s advice. Instead, his administration considered eliminating the council.

After the election, Reagan considered plans to close the Energy Department, increase coal production on federal land and deregulate surface coal mining. Once in office, he appointed James Watt, the president of a legal firm that fought to open public lands to mining and drilling, to run the Interior Department. “We’re deliriously happy,” the president of the National Coal Association was reported to have said. Reagan preserved the E.P.A. but named as its administrator Anne Gorsuch, an anti-regulation zealot who proceeded to cut the agency’s staff and budget by about a quarter

Reagan “has declared open war on solar energy,” the director of the nation’s lead solar-energy research agency said, after he was asked to resign). Reagan appeared determined to reverse the environmental achievements of Jimmy Carter, before undoing those of Richard Nixon, Lyndon Johnson, John F. Kennedy and, if he could get away with it, Theodore Roosevelt.

When Reagan considered closing the Council on Environmental Quality, its acting chairman, Malcolm Forbes Baldwin, wrote to the vice president and the White House chief of staff begging them to reconsider; in a major speech the same week, “A Conservative’s Program for the Environment,” Baldwin argued that it was “time for today’s conservatives explicitly to embrace environmentalism.” Environmental protection was not only good sense. It was good business. What could be more conservative than an efficient use of resources that led to fewer federal subsidies?

Meanwhile the Charney report continued to vibrate at the periphery of public consciousness. Its conclusions were confirmed by major studies from the Aspen Institute, the International Institute for Applied Systems Analysis near Vienna and the American Association for the Advancement of Science. Every month or so, nationally syndicated articles appeared summoning apocalypse: “Another Warning on ‘Greenhouse Effect,’ ” “Global Warming Trend ‘Beyond Human Experience,’ ” “Warming Trend Could ‘Pit Nation Against Nation.’

Pomerance read on the front page of The New York Times on Aug. 22, 1981, about a forthcoming paper in Science by a team of seven NASA scientists. They had found that the world had already warmed in the past century. Temperatures hadn’t increased beyond the range of historical averages, but the scientists predicted that the warming signal would emerge from the noise of routine weather fluctuations much sooner than previously expected. Most unusual of all, the paper ended with a policy recommendation: In the coming decades, the authors wrote, humankind should develop alternative sources of energy and use fossil fuels only “as necessary.” The lead author was James Hansen.

Pomerance listened and watched. He understood Hansen’s basic findings well enough: Earth had been warming since 1880, and the warming would reach “almost unprecedented magnitude” in the next century, leading to the familiar suite of terrors, including the flooding of a 10th of New Jersey and a quarter of Louisiana and Florida. But Pomerance was excited to find that Hansen could translate the complexities of atmospheric science into plain English.

7. ‘We’re All Going to Be the Victims’ March 1982

Gore had learned about climate change a dozen years earlier as an undergraduate at Harvard, when he took a class taught by Roger Revelle. Humankind was on the brink of radically transforming the global atmosphere, Revelle explained, drawing Keeling’s rising zigzag on the blackboard, and risked bringing about the collapse of civilization. Gore was stunned: Why wasn’t anyone talking about this?

Most in Congress considered the science committee a legislative backwater, if they considered it at all; this made Gore’s subcommittee, which had no legislative authority, an afterthought to an afterthought. That, Gore vowed, would change. Environmental and health stories had all the elements of narrative drama: villains, victims and heroes. In a hearing, you could summon all three, with the chairman serving as narrator, chorus and moral authority. He told his staff director that he wanted to hold a hearing every week.

The Revelle hearing went as Grumbly had predicted. The urgency of the issue was lost on Gore’s older colleagues, who drifted in and out while the witnesses testified. There were few people left by the time the Brookings Institution economist Lester Lave warned that humankind’s profligate exploitation of fossil fuels posed an existential test to human nature. “Carbon dioxide stands as a symbol now of our willingness to confront the future,” he said. “It will be a sad day when we decide that we just don’t have the time or thoughtfulness to address those issues.”

That night, the news programs featured the resolution of the baseball strike, the ongoing budgetary debate and the national surplus of butter.

There emerged, despite the general comity, a partisan divide. Unlike the Democrats, the Republicans demanded action. “Today I have a sense of déjà vu,” said Robert Walker, a Republican from Pennsylvania. In each of the last five years, he said, “we have been told and told and told that there is a problem with the increasing carbon dioxide in the atmosphere. We all accept that fact, and we realize that the potential consequences are certainly major in their impact on mankind.” Yet they had failed to propose a single law. “Now is the time,” he said. “The research is clear. It is up to us now to summon the political will.”

Hansen flew to Washington to testify on March 25, 1982, performing before a gallery even more thinly populated than at Gore’s first hearing on the greenhouse effect. Gore began by attacking the Reagan administration for cutting funding for carbon-dioxide research despite the “broad consensus in the scientific community that the greenhouse effect is a reality.” William Carney, a Republican from New York, bemoaned the burning of fossil fuels and argued passionately that science should serve as the basis for legislative policy

the experts invited by Gore agreed with the Republicans: The science was certain enough. Melvin Calvin, a Berkeley chemist who won the Nobel Prize for his work on the carbon cycle, said that it was useless to wait for stronger evidence of warming. “You cannot do a thing about it when the signals are so big that they come out of the noise,” he said. “You have to look for early warning signs.”

Hansen’s job was to share the warning signs, to translate the data into plain English. He explained a few discoveries that his team had made — not with computer models but in libraries. By analyzing records from hundreds of weather stations, he found that the surface temperature of the planet had already increased four-tenths of a degree Celsius in the previous century. Data from several hundred tide-gauge stations showed that the oceans had risen four inches since the 1880s

It occurred to Hansen that this was the only political question that mattered: How long until the worst began? It was not a question on which geophysicists expended much effort; the difference between five years and 50 years in the future was meaningless in geologic time. Politicians were capable of thinking only in terms of electoral time: six years, four years, two years. But when it came to the carbon problem, the two time schemes were converging.

“Within 10 or 20 years,” Hansen said, “we will see climate changes which are clearly larger than the natural variability.” James Scheuer wanted to make sure he understood this correctly. No one else had predicted that the signal would emerge that quickly. “If it were one or two degrees per century,” he said, “that would be within the range of human adaptability. But we are pushing beyond the range of human adaptability.” “Yes,” Hansen said.

How soon, Scheuer asked, would they have to change the national model of energy production? Hansen hesitated — it wasn’t a scientific question. But he couldn’t help himself. He had been irritated, during the hearing, by all the ludicrous talk about the possibility of growing more trees to offset emissions. False hopes were worse than no hope at all: They undermined the prospect of developing real solutions. “That time is very soon,” Hansen said finally. “My opinion is that it is past,” Calvin said, but he was not heard because he spoke from his seat. He was told to speak into the microphone. “It is already later,” Calvin said, “than you think.”

From Gore’s perspective, the hearing was an unequivocal success. That night Dan Rather devoted three minutes of “CBS Evening News” to the greenhouse effect. A correspondent explained that temperatures had increased over the previous century, great sheets of pack ice in Antarctica were rapidly melting, the seas were rising; Calvin said that “the trend is all in the direction of an impending catastrophe”; and Gore mocked Reagan for his shortsightedness. Later, Gore could take credit for protecting the Energy Department’s carbon-dioxide program, which in the end was largely preserved.

8. ‘The Direction of an Impending Catastrophe’ 1982

Following Henry Shaw’s recommendation to establish credibility ahead of any future legislative battles, Exxon had begun to spend conspicuously on global-warming research. It donated tens of thousands of dollars to some of the most prominent research efforts, including one at Woods Hole led by the ecologist George Woodwell, who had been calling for major climate policy as early as the mid-1970s, and an international effort coordinated by the United Nations. Now Shaw offered to fund the October 1982 symposium on climate change at Columbia’s Lamont-Doherty campus.

David boasted that Exxon would usher in a new global energy system to save the planet from the ravages of climate change. He went so far as to argue that capitalism’s blind faith in the wisdom of the free market was “less than satisfying” when it came to the greenhouse effect. Ethical considerations were necessary, too. He pledged that Exxon would revise its corporate strategy to account for climate change, even if it were not “fashionable” to do so. As Exxon had already made heavy investments in nuclear and solar technology, he was “generally upbeat” that Exxon would “invent” a future of renewable energy.

Hansen had reason to feel upbeat himself. If the world’s largest oil-and-gas company supported a new national energy model, the White House would not stand in its way. The Reagan administration was hostile to change from within its ranks. But it couldn’t be hostile to Exxon.

The carbon-dioxide issue was beginning to receive major national attention — Hansen’s own findings had become front-page news, after all. What started as a scientific story was turning into a political story.

The political realm was itself a kind of Mirror World, a parallel reality that crudely mimicked our own. It shared many of our most fundamental laws, like the laws of gravity and inertia and publicity. And if you applied enough pressure, the Mirror World of politics could be sped forward to reveal a new future. Hansen was beginning to understand that too.

1. ‘Caution, Not Panic’ 1983-1984

in the fall of 1983, the climate issue entered an especially long, dark winter. And all because of a single report that had done nothing to change the state of climate science but transformed the state of climate politics.

After the publication of the Charney report in 1979, Jimmy Carter had directed the National Academy of Sciences to prepare a comprehensive, $1 million analysis of the carbon-dioxide problem: a Warren Commission for the greenhouse effect. A team of scientist-dignitaries — among them Revelle, the Princeton modeler Syukuro Manabe and the Harvard political economist Thomas Schelling, one of the intellectual architects of Cold War game theory — would review the literature, evaluate the consequences of global warming for the world order and propose remedies

Then Reagan won the White House.

the incipient report served as the Reagan administration’s answer to every question on the subject. There could be no climate policy, Fred Koomanoff and his associates said, until the academy ruled. In the Mirror World of the Reagan administration, the warming problem hadn’t been abandoned at all. A careful, comprehensive solution was being devised. Everyone just had to wait for the academy’s elders to explain what it was.

The committee’s chairman, William Nierenberg — a Jason, presidential adviser and director of Scripps, the nation’s pre-eminent oceanographic institution — argued that action had to be taken immediately, before all the details could be known with certainty, or else it would be too late.

Better to bet on American ingenuity to save the day. Major interventions in national energy policy, taken immediately, might end up being more expensive, and less effective, than actions taken decades in the future, after more was understood about the economic and social consequences of a warmer planet. Yes, the climate would change, mostly for the worst, but future generations would be better equipped to change with it.

Government officials who knew Nierenberg were not surprised by his conclusions: He was an optimist by training and experience, a devout believer in the doctrine of American exceptionalism, one of the elite class of scientists who had helped the nation win a global war, invent the most deadly weapon conceivable and create the booming aerospace and computer industries. America had solved every existential problem it had confronted over the previous generation; it would not be daunted by an excess of carbon dioxide. Nierenberg had also served on Reagan’s transition team. Nobody believed that he had been directly influenced by his political connections, but his views — optimistic about the saving graces of market forces, pessimistic about the value of government regulation — reflected all the ardor of his party.

That’s what Nierenberg wrote in “Changing Climate.” But it’s not what he said in the press interviews that followed. He argued the opposite: There was no urgent need for action. The public should not entertain the most “extreme negative speculations” about climate change (despite the fact that many of those speculations appeared in his report). Though “Changing Climate” urged an accelerated transition to renewable fuels, noting that it would take thousands of years for the atmosphere to recover from the damage of the last century, Nierenberg recommended “caution, not panic.” Better to wait and see

The damage of “Changing Climate” was squared by the amount of attention it received. Nierenberg’s speech in the Great Hall, being one-500th the length of the actual assessment, received 500 times the press coverage. As The Wall Street Journal put it, in a line echoed by trade journals across the nation: “A panel of top scientists has some advice for people worried about the much-publicized warming of the Earth’s climate: You can cope.”

On “CBS Evening News,” Dan Rather said the academy had given “a cold shoulder” to a grim, 200-page E.P.A. assessment published earlier that week (titled “Can We Delay a Greenhouse Warming?”; the E.P.A.’s answer, reduced to a word, was no). The Washington Post described the two reports, taken together, as “clarion calls to inaction.

George Keyworth II, Reagan’s science adviser. Keyworth used Nierenberg’s optimism as reason to discount the E.P.A.’s “unwarranted and unnecessarily alarmist” report and warned against taking any “near-term corrective action” on global warming. Just in case it wasn’t clear, Keyworth added, “there are no actions recommended other than continued research.”

Edward David Jr., two years removed from boasting of Exxon’s commitment to transforming global energy policy, told Science that the corporation had reconsidered. “Exxon has reverted to being mainly a supplier of conventional hydrocarbon fuels — petroleum products, natural gas and steam coal,” David said. The American Petroleum Institute canceled its own carbon-dioxide research program, too.

Exxon soon revised its position on climate-change research. In a presentation at an industry conference, Henry Shaw cited “Changing Climate” as evidence that “the general consensus is that society has sufficient time to technologically adapt to a CO₂ greenhouse effect.” If the academy had concluded that regulations were not a serious option, why should Exxon protest

2. ‘You Scientists Win’ 1985

3. The Size of The Human Imagination Spring-Summer 1986

Curtis Moore’s proposal: Use ozone to revive climate. The ozone hole had a solution — an international treaty, already in negotiation. Why not hitch the milk wagon to the bullet train? Pomerance was skeptical. The problems were related, sure: Without a reduction in CFC emissions, you didn’t have a chance of averting cataclysmic global warming. But it had been difficult enough to explain the carbon issue to politicians and journalists; why complicate the sales pitch? Then again, he didn’t see what choice he had. The Republicans controlled the Senate, and Moore was his connection to the Senate’s environmental committee.

Pomerance met with Senator John Chafee, a Republican from Rhode Island, and helped persuade him to hold a double-barreled hearing on the twin problems of ozone and carbon dioxide on June 10 and 11, 1986

F.Sherwood Rowland, Robert Watson, a NASA scientist, and Richard Benedick, the administration’s lead representative in international ozone negotiations, would discuss ozone; James Hansen, Al Gore, the ecologist George Woodwell and Carl Wunsch, a veteran of the Charney group, would testify about climate change.

As Pomerance had hoped, fear about the ozone layer ensured a bounty of press coverage for the climate-change testimony. But as he had feared, it caused many people to conflate the two crises. One was Peter Jennings, who aired the video on ABC’s “World News Tonight,” warning that the ozone hole “could lead to flooding all over the world, also to drought and to famine.”

The confusion helped: For the first time since the “Changing Climate” report, global-warming headlines appeared by the dozen. William Nierenberg’s “caution, not panic” line was inverted. It was all panic without a hint of caution: “A Dire Forecast for ‘Greenhouse’ Earth” (the front page of The Washington Post); “Scientists Predict Catastrophes in Growing Global Heat Wave” (Chicago Tribune); “Swifter Warming of Globe Foreseen” (The New York Times).

After three years of backsliding and silence, Pomerance was exhilarated to see interest in the issue spike overnight. Not only that: A solution materialized, and a moral argument was passionately articulated — by Rhode Island’s Republican senator no less. “Ozone depletion and the greenhouse effect can no longer be treated solely as important scientific questions,” Chafee said. “They must be seen as critical problems facing the nations of the world, and they are problems that demand solutions.”

The old canard about the need for more research was roundly mocked — by Woodwell, by a W.R.I. colleague named Andrew Maguire, by Senator George Mitchell, a Democrat from Maine. “Scientists are never 100 percent certain,” the Princeton historian Theodore Rabb testified. “That notion of total certainty is something too elusive ever to be sought.” As Pomerance had been saying since 1979, it was past time to act. Only now the argument was so broadly accepted that nobody dared object.

The ozone hole, Pomerance realized, had moved the public because, though it was no more visible than global warming, people could be made to see it. They could watch it grow on video. Its metaphors were emotionally wrought: Instead of summoning a glass building that sheltered plants from chilly weather (“Everything seems to flourish in there”), the hole evoked a violent rending of the firmament, inviting deathly radiation. Americans felt that their lives were in danger. An abstract, atmospheric problem had been reduced to the size of the human imagination. It had been made just small enough, and just large enough, to break through.

Four years after “Changing Climate,” two years after a hole had torn open the firmament and a month after the United States and more than three dozen other nations signed a treaty to limit use of CFCs, the climate-change corps was ready to celebrate. It had become conventional wisdom that climate change would follow ozone’s trajectory. Reagan’s E.P.A. administrator, Lee M. Thomas, said as much the day he signed the Montreal Protocol on Substances That Deplete the Ozone Layer (the successor to the Vienna Convention), telling reporters that global warming was likely to be the subject of a future international agreement

Congress had already begun to consider policy — in 1987 alone, there were eight days of climate hearings, in three committees, across both chambers of Congress; Senator Joe Biden, a Delaware Democrat, had introduced legislation to establish a national climate-change strategy. And so it was that Jim Hansen found himself on Oct. 27 in the not especially distinguished ballroom of the Quality Inn on New Jersey Avenue, a block from the Capitol, at “Preparing for Climate Change,” which was technically a conference but felt more like a wedding.

John Topping was an old-line Rockefeller Republican, a Commerce Department lawyer under Nixon and an E.P.A. official under Reagan. He first heard about the climate problem in the halls of the E.P.A. in 1982 and sought out Hansen, who gave him a personal tutorial. Topping was amazed to discover that out of the E.P.A.’s 13,000-person staff, only seven people, by his count, were assigned to work on climate, though he figured it was more important to the long-term security of the nation than every other environmental issue combined.

Glancing around the room, Jim Hansen could chart, like an arborist counting rings on a stump, the growth of the climate issue over the decade. Veterans like Gordon MacDonald, George Woodwell and the environmental biologist Stephen Schneider stood at the center of things. Former and current staff members from the congressional science committees (Tom Grumbly, Curtis Moore, Anthony Scoville) made introductions to the congressmen they advised. Hansen’s owlish nemesis Fred Koomanoff was present, as were his counterparts from the Soviet Union and Western Europe. Rafe Pomerance’s cranium could be seen above the crowd, but unusually he was surrounded by colleagues from other environmental organizations that until now had shown little interest in a diffuse problem with no proven fund-raising record. The party’s most conspicuous newcomers, however, the outermost ring, were the oil-and-gas executives.

That evening, as a storm spat and coughed outside, Rafe Pomerance gave one of his exhortative speeches urging cooperation among the various factions, and John Chafee and Roger Revelle received awards; introductions were made and business cards earnestly exchanged. Not even a presentation by Hansen of his research could sour the mood. The next night, on Oct. 28, at a high-spirited dinner party in Topping’s townhouse on Capitol Hill, the oil-and-gas men joked with the environmentalists, the trade-group representatives chatted up the regulators and the academics got merrily drunk. Mikhail Budyko, the don of the Soviet climatologists, settled into an extended conversation about global warming with Topping’s 10-year-old son. It all seemed like the start of a grand bargain, a uniting of factions — a solution.

Hansen was accustomed to the bureaucratic nuisances that attended testifying before Congress; before a hearing, he had to send his formal statement to NASA headquarters, which forwarded it to the White House’s Office of Management and Budget for approval. “Major greenhouse climate changes are a certainty,” he had written. “By the 2010s [in every scenario], essentially the entire globe has very substantial warming.”

By all appearances, plans for major policy continued to advance rapidly. After the Johnston hearing, Timothy Wirth, a freshman Democratic senator from Colorado on the energy committee, began to plan a comprehensive package of climate-change legislation — a New Deal for global warming. Wirth asked a legislative assistant, David Harwood, to consult with experts on the issue, beginning with Rafe Pomerance, in the hope of converting the science of climate change into a new national energy policy.

In March 1988, Wirth joined 41 other senators, nearly half of them Republicans, to demand that Reagan call for an international treaty modeled after the ozone agreement. Because the United States and the Soviet Union were the world’s two largest contributors of carbon emissions, responsible for about one-third of the world total, they should lead the negotiations. Reagan agreed. In May, he signed a joint statement with Mikhail Gorbachev that included a pledge to cooperate on global warming.

Al Gore himself had, for the moment, withdrawn his political claim to the issue. In 1987, at the age of 39, Gore announced that he was running for president, in part to bring attention to global warming, but he stopped emphasizing it after the subject failed to captivate New Hampshire primary voters.

5. ‘You Will See Things That You Shall Believe’ Summer 1988

It was the hottest and driest summer in history. Everywhere you looked, something was bursting into flames. Two million acres in Alaska incinerated, and dozens of major fires scored the West. Yellowstone National Park lost nearly one million acres. Smoke was visible from Chicago, 1,600 miles away.

In Nebraska, suffering its worst drought since the Dust Bowl, there were days when every weather station registered temperatures above 100 degrees. The director of the Kansas Department of Health and Environment warned that the drought might be the dawning of a climatic change that within a half century could turn the state into a desert.

On June 22 in Washington, where it hit 100 degrees, Rafe Pomerance received a call from Jim Hansen, who was scheduled to testify the following morning at a Senate hearing called by Timothy Wirth. “I hope we have good media coverage tomorrow,” Hansen said.

Hansen had just received the most recent global temperature data. Just over halfway into the year, 1988 was setting records. Already it had nearly clinched the hottest year in history. Ahead of schedule, the signal was emerging from the noise. “I’m going to make a pretty strong statement,” Hansen said.

Hansen returned to his testimony. He wrote: “The global warming is now large enough that we can ascribe with a high degree of confidence a cause-and-effect relationship to the greenhouse effect.” He wrote: “1988 so far is so much warmer than 1987, that barring a remarkable and improbable cooling, 1988 will be the warmest year on record.” He wrote: “The greenhouse effect has been detected, and it is changing our climate now.”

“We have only one planet,” Senator Bennett Johnston intoned. “If we screw it up, we have no place to go.” Senator Max Baucus, a Democrat from Montana, called for the United Nations Environment Program to begin preparing a global remedy to the carbon-dioxide problem. Senator Dale Bumpers, a Democrat of Arkansas, previewed Hansen’s testimony, saying that it “ought to be cause for headlines in every newspaper in America tomorrow morning.” The coverage, Bumpers emphasized, was a necessary precursor to policy. “Nobody wants to take on any of the industries that produce the things that we throw up into the atmosphere,” he said. “But what you have are all these competing interests pitted against our very survival.”

Hansen, wiping his brow, spoke without affect, his eyes rarely rising from his notes. The warming trend could be detected “with 99 percent confidence,” he said. “It is changing our climate now.” But he saved his strongest comment for after the hearing, when he was encircled in the hallway by reporters. “It is time to stop waffling so much,” he said, “and say that the evidence is pretty strong that the greenhouse effect is here.”

The press followed Bumpers’s advice. Hansen’s testimony prompted headlines in dozens of newspapers across the country, including The New York Times, which announced, across the top of its front page: “Global Warming Has Begun, Expert Tells Senate.”

Rafe Pomerance called his allies on Capitol Hill, the young staff members who advised politicians, organized hearings, wrote legislation. We need to finalize a number, he told them, a specific target, in order to move the issue — to turn all this publicity into policy. The Montreal Protocol had called for a 50 percent reduction in CFC emissions by 1998. What was the right target for carbon emissions? It wasn’t enough to exhort nations to do better. That kind of talk might sound noble, but it didn’t change investments or laws. They needed a hard goal — something ambitious but reasonable. And they needed it soon: Just four days after Hansen’s star turn, politicians from 46 nations and more than 300 scientists would convene in Toronto at the World Conference on the Changing Atmosphere, an event described by Philip Shabecoff of The New York Times as “Woodstock for climate change.”

Pomerance had a proposal: a 20 percent reduction in carbon emissions by 2000. Ambitious, Harwood said. In all his work planning climate policy, he had seen no assurance that such a steep drop in emissions was possible. Then again, 2000 was more than a decade off, so it allowed for some flexibility.

Mintzer pointed out that a 20 percent reduction was consistent with the academic literature on energy efficiency. Various studies over the years had shown that you could improve efficiency in most energy systems by roughly 20 percent if you adopted best practices.

Of course, with any target, you had to take into account the fact that the developing world would inevitably consume much larger quantities of fossil fuels by 2000. But those gains could be offset by a wider propagation of the renewable technologies already at hand — solar, wind, geothermal. It was not a rigorous scientific analysis, Mintzer granted, but 20 percent sounded plausible. We wouldn’t need to solve cold fusion or ask Congress to repeal the law of gravity. We could manage it with the knowledge and technology we already had.

Besides, Pomerance said, 20 by 2000 sounds good.

The conference’s final statement, signed by all 400 scientists and politicians in attendance, repeated the demand with a slight variation: a 20 percent reduction in carbon emissions by 2005. Just like that, Pomerance’s best guess became global diplomatic policy.

Hansen, emerging from Anniek’s successful cancer surgery, took it upon himself to start a one-man public information campaign. He gave news conferences and was quoted in seemingly every article about the issue; he even appeared on television with homemade props. Like an entrant at an elementary-school science fair, he made “loaded dice” out of sections of cardboard and colored paper to illustrate the increased likelihood of hotter weather in a warmer climate. Public awareness of the greenhouse effect reached a new high of 68 percent

global warming became a major subject of the presidential campaign. While Michael Dukakis proposed tax incentives to encourage domestic oil production and boasted that coal could satisfy the nation’s energy needs for the next three centuries, George Bush took advantage. “I am an environmentalist,” he declared on the shore of Lake Erie, the first stop on a five-state environmental tour that would take him to Boston Harbor, Dukakis’s home turf. “Those who think we are powerless to do anything about the greenhouse effect,” he said, “are forgetting about the White House effect.”

His running mate emphasized the ticket’s commitment to the issue at the vice-presidential debate. “The greenhouse effect is an important environmental issue,” Dan Quayle said. “We need to get on with it. And in a George Bush administration, you can bet that we will.”

This kind of talk roused the oil-and-gas men. “A lot of people on the Hill see the greenhouse effect as the issue of the 1990s,” a gas lobbyist told Oil & Gas Journal. Before a meeting of oil executives shortly after the “environmentalist” candidate won the election, Representative Dick Cheney, a Wyoming Republican, warned, “It’s going to be very difficult to fend off some kind of gasoline tax.” The coal industry, which had the most to lose from restrictions on carbon emissions, had moved beyond denial to resignation. A spokesman for the National Coal Association acknowledged that the greenhouse effect was no longer “an emerging issue. It is here already, and we’ll be hearing more and more about it.”

By the end of the year, 32 climate bills had been introduced in Congress, led by Wirth’s omnibus National Energy Policy Act of 1988. Co-sponsored by 13 Democrats and five Republicans, it established as a national goal an “International Global Agreement on the Atmosphere by 1992,” ordered the Energy Department to submit to Congress a plan to reduce energy use by at least 2 percent a year through 2005 and directed the Congressional Budget Office to calculate the feasibility of a carbon tax. A lawyer for the Senate energy committee told an industry journal that lawmakers were “frightened” by the issue and predicted that Congress would eventually pass significant legislation after Bush took office

The other great powers refused to wait. The German Parliament created a special commission on climate change, which concluded that action had to be taken immediately, “irrespective of any need for further research,” and that the Toronto goal was inadequate; it recommended a 30 percent reduction of carbon emissions

Margaret Thatcher, who had studied chemistry at Oxford, warned in a speech to the Royal Society that global warming could “greatly exceed the capacity of our natural habitat to cope” and that “the health of the economy and the health of our environment are totally dependent upon each other.”

The prime ministers of Canada and Norway called for a binding international treaty on the atmosphere; Sweden’s Parliament went further, announcing a national strategy to stabilize emissions at the 1988 level and eventually imposing a carbon tax

the United Nations unanimously endorsed the establishment, by the World Meteorological Organization and the United Nations Environment Program, of an Intergovernmental Panel on Climate Change, composed of scientists and policymakers, to conduct scientific assessments and develop global climate policy.

One of the I.P.C.C.’s first sessions to plan an international treaty was hosted by the State Department, 10 days after Bush’s inauguration. James Baker chose the occasion to make his first speech as secretary of state. “We can probably not afford to wait until all of the uncertainties about global climate change have been resolved,” he said. “Time will not make the problem go away.”

: On April 14, 1989, a bipartisan group of 24 senators, led by the majority leader, George Mitchell, requested that Bush cut emissions in the United States even before the I.P.C.C.’s working group made its recommendation. “We cannot afford the long lead times associated with a comprehensive global agreement,” the senators wrote. Bush had promised to combat the greenhouse effect with the White House effect. The self-proclaimed environmentalist was now seated in the Oval Office. It was time.

8. ‘You Never Beat The White House’ April 1989

After Jim Baker gave his boisterous address to the I.P.C.C. working group at the State Department, he received a visit from John Sununu, Bush’s chief of staff. Leave the science to the scientists, Sununu told Baker. Stay clear of this greenhouse-effect nonsense. You don’t know what you’re talking about. Baker, who had served as Reagan’s chief of staff, didn’t speak about the subject again.

despite his reputation as a political wolf, he still thought of himself as a scientist — an “old engineer,” as he was fond of putting it, having earned a Ph.D. in mechanical engineering from M.I.T. decades earlier. He lacked the reflexive deference that so many of his political generation reserved for the class of elite government scientists.

Since World War II, he believed, conspiratorial forces had used the imprimatur of scientific knowledge to advance an “anti-growth” doctrine. He reserved particular disdain for Paul Ehrlich’s “The Population Bomb,” which prophesied that hundreds of millions of people would starve to death if the world took no step to curb population growth; the Club of Rome, an organization of European scientists, heads of state and economists, which similarly warned that the world would run out of natural resources; and as recently as the mid-’70s, the hypothesis advanced by some of the nation’s most celebrated scientists — including Carl Sagan, Stephen Schneider and Ichtiaque Rasool — that a new ice age was dawning, thanks to the proliferation of man-made aerosols. All were theories of questionable scientific merit, portending vast, authoritarian remedies to halt economic progress.

When Mead talked about “far-reaching” decisions and “long-term consequences,” Sununu heard the marching of jackboots.

Sununu had suspected that the greenhouse effect belonged to this nefarious cabal since 1975, when the anthropologist Margaret Mead convened a symposium on the subject at the National Institute of Environmental Health Sciences.

While Sununu and Darman reviewed Hansen’s statements, the E.P.A. administrator, William K. Reilly, took a new proposal to the White House. The next meeting of the I.P.C.C.’s working group was scheduled for Geneva the following month, in May; it was the perfect occasion, Reilly argued, to take a stronger stand on climate change. Bush should demand a global treaty to reduce carbon emissions.

Sununu wouldn’t budge. He ordered the American delegates not to make any commitment in Geneva. Very soon after that, someone leaked the exchange to the press.

A deputy of Jim Baker pulled Reilly aside. He said he had a message from Baker, who had observed Reilly’s infighting with Sununu. “In the long run,” the deputy warned Reilly, “you never beat the White House.”

9. ‘A Form of Science Fraud’ May 1989

The cameras followed Hansen and Gore into the marbled hallway. Hansen insisted that he wanted to focus on the science. Gore focused on the politics. “I think they’re scared of the truth,” he said. “They’re scared that Hansen and the other scientists are right and that some dramatic policy changes are going to be needed, and they don’t want to face up to it.”

The censorship did more to publicize Hansen’s testimony and the dangers of global warming than anything he could have possibly said. At the White House briefing later that morning, Press Secretary Marlin Fitzwater admitted that Hansen’s statement had been changed. He blamed an official “five levels down from the top” and promised that there would be no retaliation. Hansen, he added, was “an outstanding and distinguished scientist” and was “doing a great job.”

10. The White House Effect Fall 1989

The Los Angeles Times called the censorship “an outrageous assault.” The Chicago Tribune said it was the beginning of “a cold war on global warming,” and The New York Times warned that the White House’s “heavy-handed intervention sends the signal that Washington wants to go slow on addressing the greenhouse problem.”

Darman went to see Sununu. He didn’t like being accused of censoring scientists. They needed to issue some kind of response. Sununu called Reilly to ask if he had any ideas. We could start, Reilly said, by recommitting to a global climate treaty. The United States was the only Western nation on record as opposing negotiations.

Sununu sent a telegram to Geneva endorsing a plan “to develop full international consensus on necessary steps to prepare for a formal treaty-negotiating process. The scope and importance of this issue are so great that it is essential for the U.S. to exercise leadership.”

Sununu seethed at any mention of the subject. He had taken it upon himself to study more deeply the greenhouse effect; he would have a rudimentary, one-dimensional general circulation model installed on his personal desktop computer. He decided that the models promoted by Jim Hansen were a lot of bunk. They were horribly imprecise in scale and underestimated the ocean’s ability to mitigate warming. Sununu complained about Hansen to D. Allan Bromley, a nuclear physicist from Yale who, at Sununu’s recommendation, was named Bush’s science adviser. Hansen’s findings were “technical poppycock” that didn’t begin to justify such wild-eyed pronouncements that “the greenhouse effect is here” or that the 1988 heat waves could be attributed to global warming, let alone serve as the basis for national economic policy.

When a junior staff member in the Energy Department, in a meeting at the White House with Sununu and Reilly, mentioned an initiative to reduce fossil-fuel use, Sununu interrupted her. “Why in the world would you need to reduce fossil-fuel use?” he asked. “Because of climate change,” the young woman replied. “I don’t want anyone in this administration without a scientific background using ‘climate change’ or ‘global warming’ ever again,” he said. “If you don’t have a technical basis for policy, don’t run around making decisions on the basis of newspaper headlines.” After the meeting, Reilly caught up to the staff member in the hallway. She was shaken. Don’t take it personally, Reilly told her. Sununu might have been looking at you, but that was directed at me.

Reilly, for his part, didn’t entirely blame Sununu for Bush’s indecision on the prospect of a climate treaty. The president had never taken a vigorous interest in global warming and was mainly briefed about it by nonscientists. Bush had brought up the subject on the campaign trail, in his speech about the White House effect, after leafing through a briefing booklet for a new issue that might generate some positive press. When Reilly tried in person to persuade him to take action, Bush deferred to Sununu and Baker. Why don’t the three of you work it out, he said. Let me know when you decide

Relations between Sununu and Reilly became openly adversarial. Reilly, Sununu thought, was a creature of the environmental lobby. He was trying to impress his friends at the E.P.A. without having a basic grasp of the science himself.

Pomerance had the sinking feeling that the momentum of the previous year was beginning to flag. The censoring of Hansen’s testimony and the inexplicably strident opposition from John Sununu were ominous signs. So were the findings of a report Pomerance had commissioned, published in September by the World Resources Institute, tracking global greenhouse-gas emissions. The United States was the largest contributor by far, producing nearly a quarter of the world’s carbon emissions, and its contribution was growing faster than that of every other country. Bush’s indecision, or perhaps inattention, had already managed to delay the negotiation of a global climate treaty until 1990 at the earliest, perhaps even 1991. By then, Pomerance worried, it would be too late.

Pomerance tried to be more diplomatic. “The president made a commitment to the American people to deal with global warming,” he told The Washington Post, “and he hasn’t followed it up.” He didn’t want to sound defeated. “There are some good building blocks here,” Pomerance said, and he meant it. The Montreal Protocol on CFCs wasn’t perfect at first, either — it had huge loopholes and weak restrictions. Once in place, however, the restrictions could be tightened. Perhaps the same could happen with climate change. Perhaps. Pomerance was not one for pessimism. As William Reilly told reporters, dutifully defending the official position forced upon him, it was the first time that the United States had formally endorsed the concept of an emissions limit. Pomerance wanted to believe that this was progress.

All week in Noordwijk, Becker couldn’t stop talking about what he had seen in Zeeland. After a flood in 1953, when the sea swallowed much of the region, killing more than 2,000 people, the Dutch began to build the Delta Works, a vast concrete-and-steel fortress of movable barriers, dams and sluice gates — a masterpiece of human engineering. The whole system could be locked into place within 90 minutes, defending the land against storm surge. It reduced the country’s exposure to the sea by 700 kilometers, Becker explained. The United States coastline was about 153,000 kilometers long. How long, he asked, was the entire terrestrial coastline? Because the whole world was going to need this. In Zeeland, he said, he had seen the future.

Ken Caldeira, a climate scientist at the Carnegie Institution for Science in Stanford, Calif., has a habit of asking new graduate students to name the largest fundamental breakthrough in climate physics since 1979. It’s a trick question. There has been no breakthrough. As with any mature scientific discipline, there is only refinement. The computer models grow more precise; the regional analyses sharpen; estimates solidify into observational data. Where there have been inaccuracies, they have tended to be in the direction of understatement.

More carbon has been released into the atmosphere since the final day of the Noordwijk conference, Nov. 7, 1989, than in the entire history of civilization preceding it

Despite every action taken since the Charney report — the billions of dollars invested in research, the nonbinding treaties, the investments in renewable energy — the only number that counts, the total quantity of global greenhouse gas emitted per year, has continued its inexorable rise.

When it comes to our own nation, which has failed to make any binding commitments whatsoever, the dominant narrative for the last quarter century has concerned the efforts of the fossil-fuel industries to suppress science, confuse public knowledge and bribe politicians.

The mustache-twirling depravity of these campaigns has left the impression that the oil-and-gas industry always operated thus; while the Exxon scientists and American Petroleum Institute clerics of the ’70s and ’80s were hardly good Samaritans, they did not start multimillion-dollar disinformation campaigns, pay scientists to distort the truth or try to brainwash children in elementary schools, as their successors would.

It was James Hansen’s testimony before Congress in 1988 that, for the first time since the “Changing Climate” report, made oil-and-gas executives begin to consider the issue’s potential to hurt their profits. Exxon, as ever, led the field. Six weeks after Hansen’s testimony, Exxon’s manager of science and strategy development, Duane LeVine, prepared an internal strategy paper urging the company to “emphasize the uncertainty in scientific conclusions.” This shortly became the default position of the entire sector. LeVine, it so happened, served as chairman of the global petroleum industry’s Working Group on Global Climate Change, created the same year, which adopted Exxon’s position as its own

The American Petroleum Institute, after holding a series of internal briefings on the subject in the fall and winter of 1988, including one for the chief executives of the dozen or so largest oil companies, took a similar, if slightly more diplomatic, line. It set aside money for carbon-dioxide policy — about $100,000, a fraction of the millions it was spending on the health effects of benzene, but enough to establish a lobbying organization called, in an admirable flourish of newspeak, the Global Climate Coalition.

The G.C.C. was conceived as a reactive body, to share news of any proposed regulations, but on a whim, it added a press campaign, to be coordinated mainly by the A.P.I. It gave briefings to politicians known to be friendly to the industry and approached scientists who professed skepticism about global warming. The A.P.I.’s payment for an original op-ed was $2,000.

It was joined by the U.S. Chamber of Commerce and 14 other trade associations, including those representing the coal, electric-grid and automobile industries

In October 1989, scientists allied with the G.C.C. began to be quoted in national publications, giving an issue that lacked controversy a convenient fulcrum. “Many respected scientists say the available evidence doesn’t warrant the doomsday warnings,” was the caveat that began to appear in articles on climate change.

The following year, when President Bill Clinton proposed an energy tax in the hope of meeting the goals of the Rio treaty, the A.P.I. invested $1.8 million in a G.C.C. disinformation campaign. Senate Democrats from oil-and-coal states joined Republicans to defeat the tax proposal, which later contributed to the Republicans’ rout of Democrats in the midterm congressional elections in 1994 — the first time the Republican Party had won control of both houses in 40 years

The G.C.C. spent $13 million on a single ad campaign intended to weaken support for the 1997 Kyoto Protocol, which committed its parties to reducing greenhouse-gas emissions by 5 percent relative to 1990 levels. The Senate, which would have had to ratify the agreement, took a pre-emptive vote declaring its opposition; the resolution passed 95-0. There has never been another serious effort to negotiate a binding global climate treaty.

. This has made the corporation an especially vulnerable target for the wave of compensatory litigation that began in earnest in the last three years and may last a generation. Tort lawsuits have become possible only in recent years, as scientists have begun more precisely to attribute regional effects to global emission levels. This is one subfield of climate science that has advanced significantly sin

Pomerance had not been among the 400 delegates invited to Noordwijk. But together with three young activists — Daniel Becker of the Sierra Club, Alden Meyer of the Union of Concerned Scientists and Stewart Boyle from Friends of the Earth — he had formed his own impromptu delegation. Their constituency, they liked to say, was the climate itself. Their mission was to pressure the delegates to include in the final conference statement, which would be used as the basis for a global treaty, the target proposed in Toronto: a 20 percent reduction of greenhouse-gas combustion by 2005. It was the only measure that mattered, the amount of emissions reductions, and the Toronto number was the strongest global target yet proposed.

The delegations would review the progress made by the I.P.C.C. and decide whether to endorse a framework for a global treaty. There was a general sense among the delegates that they would, at minimum, agree to the target proposed by the host, the Dutch environmental minister, more modest than the Toronto number: a freezing of greenhouse-gas emissions at 1990 levels by 2000. Some believed that if the meeting was a success, it would encourage the I.P.C.C. to accelerate its negotiations and reach a decision about a treaty sooner. But at the very least, the world’s environmental ministers should sign a statement endorsing a hard, binding target of emissions reductions. The mood among the delegates was electric, nearly giddy — after more than a decade of fruitless international meetings, they could finally sign an agreement that meant something.

11. ‘The Skunks at The Garden Party’ November 1989

It was nearly freezing — Nov. 6, 1989, on the coast of the North Sea in the Dutch resort town of Noordwijk

Losing Earth: The Decade WeAlmost Stopped Climate Change We knew everything we needed to know, and nothing stood in our way. Nothing, that is, except ourselves. A tragedy in two acts. By Nathaniel RichPhotographs and Videos by George Steinmetz AUG. 1, 2018

they gave many explanations, but one of the most compelling—and depressing—is rooted in how our education system teaches kids to relate to books.

where I was in public elementary school in the early ’80s, we did have state assessments that tested reading level and comprehension, but the focus was on reading as many books as possible and engaging emotionally with them as a way to develop the requisite skills.

the focus on reading analytically seems to be squashing that organic enjoyment

By middle school, not only is there even less time for activities such as class read-alouds, but instruction also continues to center heavily on passage analysis

here’s how one educator experienced in writing Common Core–aligned curricula proposes this be taught: First, teachers introduce the concepts of nonliteral and figurative language. Then, kids read a single paragraph from Amelia Bedelia and answer written questions.

Jumping into a paragraph in the middle of a book is about as appealing for most kids as cleaning their room.

the advent of accountability laws and policies, starting with No Child Left Behind in 2001, and accompanying high-stakes assessments based on standards, be they Common Core or similar state alternatives, has put enormous pressure on instructors to teach to these tests at the expense of best practices.

“There’s a whole generation of kids who associate reading with assessment now,”

this hyperfocus on analysis comes at a steep price: The love of books and storytelling is being lost.

the idea that reading all kinds of books is enjoyable is not the one kids seem to be receiving.

Longer books, for example, are considered less “fun”; in addition, some librarians, teachers, and parents are noticing a decline in kids’ reading stamina after the disruption of the pandemic.

we need to get to the root of the problem, which is not about book lengths but the larger educational system. We can’t let tests control how teachers teach: Close reading may be easy to measure, but it’s not the way to get kids to fall in love with storytelling

Teachers need to be given the freedom to teach in developmentally appropriate ways, using books they know will excite and challenge kids.

Kids should be required to read more books, and instead of just analyzing passages, they should be encouraged to engage with these books the way they connect with “fun” series, video games, and TV shows.