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When Weyrich samples tartar from teeth, she’s careful to pick jaws that have more than one tooth and to always leave some tartar behind. You don’t want to destroy it all, she explains, because you never know what techniques might come along in the future.

Obama is this triumph of political persuasion and compromise. And then he also leaves behind, certainly a less persuadable Republican Party and a more fractured and polarized political system. And I’m not saying that’s his fault. But it is part of the whole thing, in this really, I think, difficult way that is shaping our politics now.

But even after, I think, a shift in perspective around George Floyd, we’re still back into the trenches of how do we get different district attorneys elected? And how do we actually reform police departments? And now, we’re back in the world of politics. And as soon as we get back into the world of politics, it’s a numbers game.

But look, when you’re dealing at the macro level, when you’re dealing with 300 million people with enormous regional, and racial, and religious, and cultural differences, then now you are having to make some calculations. So let’s take the example you used. And I write extensively about the emergence of the Tea Party. And we could see that happening with Sarah Palin.

I set up that kind of persuasion and pluralism tension, because something that really struck me about the book is how much it lives in paradoxes, how much it’s comfortable with the idea, that you’re comfortable with the idea that something and its opposite are true at the same time. And I think of a politics of persuasion as being the central paradox of your presidency. So you accomplished this massive act of persuasion, winning the presidency twice, as a Black man with the middle name Hussein.

Now, why that is the way I think about things generally partly is temperament. Partly it’s biographical. As I’ve written not just in this recent book but in past books, if you’re a kid whose parents are from Kansas and Kenya, and you’re born in Hawaii, and you live in Indonesia, you are naturally having to figure out, well, how did all these pieces fit together?

So you have this real difference now between the parties, where Democrats need to win right of center voters to win national power. But Republicans do not need to win left of center voters to win national power. And that’s really changed the strategic picture for both of them.

And even on historically difficult issues like race, people aren’t going around thinking, man, how can we do terrible things to people who don’t look like us? That’s not people’s perspective. What they are concerned about is not being taken advantage of, or is their way of life and traditions slipping away from them?

I mean, I think it’s fair to say that the difference in how George H. W. Bush, Bill Clinton, George W. Bush, Obama administration would’ve approached the basic issue of a pandemic and vaccines, there might be differences in terms of efficacy, or how well programs were run, et cetera. But it’s hard to imagine a previous Republican administration completely ignoring science.

Vaccinations have risen sharply in children 12 years and older, weeks after the Food and Drug Administration said that cohort is eligible to receive the COVID-19 vaccine made by Pfizer-BioNTech. Nearly 5 million adolescents have received at least one dose of the vaccine, according to the CDC's latest data.

President Biden said this month that his new goal is to administer at least one dose of a COVID-19 vaccine to 70% of U.S. adults by the Fourth of July.

Acknowledging the welcome return to a more normal life taking place around the country, he urged more people to get the vaccine: "Unless you're vaccinated, you're at risk."

An increasing number of states, businesses and organizations are offering incentives for people to get vaccinated, from free doughnuts to free airline flights. One of the best-known programs is in Ohio, where people who get vaccinated are entered into a $1 million lottery called the Ohio Vax-a-Million.

Ohio's vaccination rate went up 55% among young adults in the days after unveiling the program.

The U.S. has reported more than 33 million COVID-19 cases, and more than 590,000 people have died from the disease.

The lowest overall vaccination rates in the U.S. remain in the South, where Mississippi, Alabama, Louisiana and Arkansas have administered the fewest doses per 100,000 adults, according to the CDC. The highest rates are in Vermont, Massachusetts, Hawaii and Connecticut.

In his speech, Biden will also announce new vaccination incentives, new outreach efforts to educate Americans about the safety and efficacy of the vaccines and new steps to make it easier for Americans to get the shot.

Four of the nation's largest childcare providers will offer free childcare from now until July 4 to Americans who are getting their Covid-19 vaccine or recovering from the shot, the White House announced Wednesday.

Starting next week, thousands of pharmacies, including Albertsons, CVS, Rite-Aid, and Walgreens will stay open late every Friday in June in order to allow more Americans to get vaccinated.

Thousands of employers and businesses have also offered incentives for Americans to get vaccinated this month. Nearly 51% of the total US population has received at least one dose of Covid-19 vaccine, and nearly 41% of the total population is fully vaccinated, according to CDC data.

CDC data shows 12 states have met the Biden administration's goal to have 70% of adults with at least one dose of a Covid-19 vaccine. California and Maryland recently joined Connecticut, Hawaii, Maine, Massachusetts, New Hampshire, New Jersey, New Mexico, Pennsylvania, Rhode Island and Vermont in reaching that benchmark.

Three Covid-19 vaccines have emergency use authorization by the FDA -- the two-shot Moderna and Pfizer/BioNTech vaccines and the one shot vaccine from Johnson & Johnson.

Florida's state legislature passed the Sunshine Protection Act in 2018 hoping to move themselves into DST. But like the 14 other states that have enacted legislation or passed a resolution in the last four years to make DST permanent, none can take effect without an act of the U.S. Congress.

He cited multiple benefits to permanent DST including potentially fewer car accidents and easing seasonal depression.

The effort is supported by a bipartisan group of lawmakers, including Sen. Ed Markey of Massachusetts, who echoed Rubio in highlighting the potential benefits of extending DST.

"Studies have found year-round Daylight Saving Time would improve public health, public safety, and mental health

Opponents of permanent daylight saving time note that winter mornings would be darker, with children more often having to wait for the school bus in the dark.

Trump v. Hawaii’s lengthy 87 pages include a majority opinion by Chief Justice John Roberts, concurring opinions by Justices Anthony Kennedy and Clarence Thomas, and dissenting opinions by Justices Stephen Breyer and Sonia Sotomayor. I hadn’t picked it up since first reading it on that frantic June day when the 2017-18 term ended and Justice Kennedy announced his retirement. I went back to it the other day, curious to see how reading it would feel in light of all the additional data points we have accumulated about the Trump presidency.

In other words, parents of religious-school students ended up with a privilege that no other parents in the state enjoyed, all in the name of preventing discrimination against religion.

“An anxious world must know,” he wrote in conclusion, “that our government remains committed always to the liberties the Constitution seeks to preserve and protect, so that freedom extends outward, and lasts.”

Words of warning, certainly. A note of desperate hope? Perhaps.

It's doubtful that the average American grasps those nuances, instead hearing "Russian asset," with respect to Gabbard, as "working for the Russians." There are better ways Clinton might have explained the issue: focusing on Russia as the bad actor and emphasizing its efforts to interfere with American democracy; pointing out that Russia's bolstering of the Gabbard campaign is one data point in this larger effort (it's certainly not the only one). That's the route Clinton should have taken. Instead, she turned the spotlight on a relatively inconsequential congresswoman, and opened up an opportunity for right-wing media scavengers to elevate her.

Gabbard, it should be noted, is polling so badly that she hasn't yet qualified for the November Democratic primary debate. Hillary Clinton, it shouldn't need to be said, is not running for president, and not even in a position to be puppeteering the race from behind the scenes.

Gabbard may very well launch a third-party run, quietly backed by all kinds of nefarious troublemakers. But that run will only be a threat if Gabbard has some fire behind her campaign. Right now, she's flaming out. 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What happens next? Well, Sanders has the AOC endorsement as well as $30+ million in the bank -- two very good things with about 100 days left until Iowa. The question now becomes: Does he have another issue on the campaign trail related to his health or age? If not, Sanders' heart attack might seem like a million years ago by the time Iowa Democrats turn out to vote in the caucuses. But if Sanders has any sort of problem between now and then, it's likely the end of his campaign.

Hillary Clinton started one of the strangest news cycles in the 2020 race at the end of the last week when she seemed to suggest that the Russians were "grooming" Hawaii Rep. Tulsi Gabbard to run as a third-party candidate. Gabbard, thrilled with the unexpected chance to battle with one of the biggest figures in the party, called Clinton the "queen of warmongers, embodiment of corruption, and personification of the rot that has sickened the Democratic Party for so long."

And yet, there are cracks. Over the weekend, former Ohio Gov. John Kasich announced that he supported the impeachment and removal of Trump. Florida Rep. Francis Rooney, a Republican, said he would consider impeaching Trump -- and then promptly announced his plan to retire from Congress in 2020.

1. The new Democratic front-runner ... now what?: There's a new top dog in the Democratic field: Elizabeth Warren. As Harry Enten and I noted in our brandnew rankings of the 10 Democrats most likely to wind up as the party's nominee, Warren has overtaken Biden not just in polling but also in money and organization. She also has the clearest path to be the nominee, with a polling and organizational edges in Iowa and a geographic connection in New Hampshire.

Warren's most obvious weakness -- from a policy perspective -- is on her ongoing unwillingness to state, clearly, whether or not middle-class families will see their taxes go up under her "Medicare for All" plan. The answer to that is almost certainly yes -- as Sanders, another "Medicare for All" proponent, acknowledged in the debate.  

Mr Bernhardt's review of the drone programme reflects a growing concern among US officials about Chinese technology and espionage.President Donald Trump has spoken in dark terms about China, saying that its leaders have "cheated" the US and that its intelligence agents spy on people here. Chinese officials deny the accusations.

US officials have said in the past that Huawei, the telecommunications company, and other Chinese companies could pose a security threat. Some Chinese analysts say the fight is not over national security but market share. The Chinese are better at making products, they say, and Americans are jealous. The Chinese analysts see the US policies as a form of protectionism.

The drones are now at the centre of the US-China dispute.Many of the drones that are used by US scientists are made by a Shenzhen-based company called Da Jiang Innovations Science and Technology Company, or, DJI. The company dominates the drone market, according to a research company, Skylogic.

Rules and norms are different for private companies in China than they are in the US. Business executives in China stay in close contact with government officials. US officials worry about the information that Chinese drones could collect and what might be done with the data.

Executives who work for DJI say their drones are trustworthy. Michael Oldenburg, a spokesman for DJI Technology Inc, tells the BBC there is no "credible evidence to support a broad country-of-origin restriction on drone technology".Many US analysts agree with Oldenburg's assessment. "I doubt the Chinese government is using the drones to conduct massive surveillance," says David Fidler, an adjunct senior fellow at the Council on Foreign Relations.

The real assessment, the one from the secretary of the interior, is yet to be announced, however. In the meantime, scientists and others wait - and wonder - about the fate of the drones.

"But he also wants to make clear his commitment to earning the support and trust of every voter in South Carolina

Buttigieg has struggled in the polls in South Carolina, especially with African American voters, despite polling at or near the top in several early primary states.

Buttigieg and Minnesota Sen. Amy Klobuchar were among just a few candidates not slated to attend the South Carolina event -- though Klobuchar communications director Tim Hogan said in a tweet that Klobuchar will attend the prayer service in Columbia ahead of an early speaking slot in Iowa at the Brown and Black forum.

"Amy is attending the prayer service on Monday in South Carolina and the Iowa Brown and Black Presidential Forum on the same day.

Former Vice President Joe Biden, Hawaii Rep. Tulsi Gabbard, Vermont Sen. Bernie Sanders, businessman Tom Steyer and Massachusetts Sen. Elizabeth Warren were all committed to the event when the South Carolina NAACP released the schedule of events last week. Former Massachusetts Gov. Deval Patrick's campaign sent out a statement on Saturday saying Patrick would participate as well.

Asked if he'd be disappointed if Klobuchar didn't attend the march to the state house after attending the prayer breakfast, Sellers said it'd be a partial effort.

Antjuan Seawright, a South Carolina Democratic strategist who had also voiced frustration last week over the small field of candidates attending the King Day at the Dome events, said he was "very pleased" with Buttigieg's decision.

look forward to hearing from him like so many others in South Carolina," Seawright told CNN

And some could face more serious charges, including in the death of Brian D. Sicknick, a Capitol Police officer who was overpowered by rioters who, according to two law enforcement officials, struck his head with a fire extinguisher. He was rushed to the hospital and died on Thursday.

He also rebutted the notion of any involvement in the violence by left-wing antifascist agitators, whom Mr. Trump’s supporters have falsely tried to blame.

One of the most serious federal cases involved Lonnie L. Coffman of Falkville, Ala. In the bed of his truck, officers found what they described as an M4 assault rifle and magazines loaded with ammunition. They also found rags, lighters and 11 glass Mason jars filled with a liquid later identified as gasoline.

“The goal here is to identify people and get them,” Mr. Kohl said.The Washington police have also arrested dozens, mostly on charges of unlawful entry and curfew violations.

The images of Mr. Barnett were “shocking” and “repulsive,” said Jeffrey A. Rosen, the acting attorney general.

Prosecutors charged the leader and founder of the Hawaii chapter of the far-right Proud Boys group, Nicholas Robert Ochs, with unlawful entry after he posted a picture on Twitter from the Capitol and told a CNN reporter that he had gone inside.

A pair of pipe bombs found on Wednesday afternoon outside the Democratic and Republican Party headquarters, blocks from the Capitol, contained crude mechanical timing devices, according to an official familiar with their initial examination, suggesting they were intended to be detonated. It was not clear when they were meant to explode.

Other close allies of the president made similar comments at the rally. His eldest son, Donald Trump Jr., said that Republicans should back Mr. Trump’s efforts to undo the election result or face consequences. “We’re coming for you,” he said.

Incitement of a riot is a misdemeanor crime in Washington that carries up to 180 days in prison or a $1,000 fine, but the maximum sentence increases to 10 years if victims suffer serious bodily harm or serious property damage occurs.

It marked a major victory in the eyes of human rights advocates in the country who have been fighting to hold American service members accountable for violence against Filipina women — which they see as a byproduct of the U.S. military’s 120-year presence

With the Pemberton conviction, it seemed that justice was finally moving in the right direction.

But on Sept. 13, Pemberton was put aboard a U.S. military cargo plane and flown out of the Philippines, a free man. A week earlier, President Rodrigo Duterte made the bombshell announcement that he had granted Pemberton an absolute pardon, nullifying the Marine’s sentence after less than six years served.

After the guilty verdict was announced, the judge ordered Pemberton to start serving his sentence at New Bilibid Prison, the largest detention facility in the Philippines, where more than 26,000 convicted men sleep in crowded cell blocks, disease festers and temperatures can reach over 100 degrees in the summer. But that detention order was revised just hours later

the presidential pardon came just hours after Duterte’s own administration filed a motion to block a court order that would have freed the Marine on other grounds.

the recent developments have seen the case deteriorate into an apparent tool for political leverage rather than justice

“This should give us a lesson that the U.S. has no respect for our sovereignty,” Virginia Lacsa Suarez, the attorney for the Laude family, told The New York Times in response to the court order to release Pemberton that was issued even before the pardon. “It shows that the U.S. looks down on us, that the U.S. does not even respect our laws.

From the beginning, the United States maintained an influence over the Pemberton case, despite the Philippines’ jurisdiction over crimes committed by U.S. service members. In 2014, Pemberton was first questioned by the United States Naval Criminal Investigative Service instead of Philippine police, and he was initially held onboard his ship, the U.S.S. Peleliu, anchored in Subic Bay, and then under U.S. guard at a Philippine military base, instead of in a Philippine jail. After he was arrested, the Marine Corps hired an attorney to represent him and paid all his legal fees, which had exceeded $550,000 by this fall

The pardon is the final chapter of a polarizing, high-profile case that has cost the U.S. Marine Corps more than half a million dollars and provoked debate over decades-old defense treaties between the two countries.

The agreement grants the United States considerable privileges toward determining where convicted American personnel will be detained, and Pemberton remained in a private air-conditioned cell fashioned from a shipping container at Camp Aguinaldo, a Philippine military base where he was monitored by two guards from the Philippine Bureau of Corrections and a steady rotation of U.S. service members. Pemberton’s rank remained unchanged and he continued receiving his monthly salary of about $2,300, totaling more than $160,000 since the killing.

brought back bitter memories for Filipinos of another case in which a U.S. Marine was accused of rape. In 2006, Lance Cpl. Daniel Smith received a 40-year prison sentence for raping Suzette Nicolas

Smith was held briefly in a Philippine jail, but after the United States canceled a joint military exercise in the Philippines, he was handed over to the U.S. Embassy. Smith remained at the embassy for more than two years, until Nicolas unexpectedly recanted her accusation and Smith was acquitted and returned home.

“In both cases, there are many forces trying to undermine the testimonies of the victims, or the witnesses or their families,

From the get-go, it was fishy,

Garcia-Flores had submitted a motion under the Philippines’ Good Conduct Time Allowance law, and Judge Roline Ginez-Jabalde, the same official who convicted Pemberton in 2015, ruled that the Marine was free to go, on the grounds that he had already served almost six years and had earned four years off his sentence for good behavior while in custody.

“A crime happened, and Pemberton paid for it under the Philippine law without any special privileges,” Garcia-Flores says. “If people think that he’s being given some special treatment, they are wrong.”

Suarez immediately moved to oppose Pemberton’s release, and so did the Department of Justice, arguing that only the Bureau of Corrections, not the Philippine courts, had the authority to determine whether Pemberton deserved time off his sentence for good conduct

Duterte met with Secretary of Justice Menardo Guevarra to discuss his constitutional right to grant an absolute pardon. At 4:51 p.m. the same day, Duterte’s secretary of foreign affairs, Teodoro Locsin Jr., announced the pardon in a tweet. “If there is a time when you are called upon to be fair, be fair,” Dutuerte said later in a televised address.

The news drew protests as the president’s critics took to social media and the streets, organizing demonstrations in Manila to voice their anger at Duterte’s decision. Many members of the L.G.B.T.Q. community thought the president was sending a signal that the Philippine government doesn’t believe that the lives of transgender women are important.

Beyond the question of whether the pardon was an anti-trans reaction by Duterte, it may have also been a strategic move to gain an advantage in relations with the United States

In February, Duterte gave notice that he was terminating the Visiting Forces Agreement, a move that many interpreted as a response to the U.S. State Department revoking the visa of Senator Ronald dela Rosa, the former National Police chief widely regarded as the architect of the administration’s notoriously violent war on drugs. Then in June, Duterte confirmed that he wouldn’t be canceling the agreement for at least another six months, and in July, dela Rosa announced that the United States would be reinstating his visa.

Despite Duterte’s outwardly critical stance toward the United States, relations between the two countries remain strong.

It’s the latest in more than $1.5 billion in arms that Duterte’s administration has moved to purchase from the United States this year, despite calls from Human Rights Watch for Congress to block the sales, citing the Philippine armed forces’ lengthy history of military and human rights abuses

Duterte was always likely to take a pragmatic approach to Pemberton’s release. “He’s willing to engage with us, but it’s not his first preference in most situations,” Schaus says. “But when an opportunity presents itself to advance his priorities in a way that is palatable to him, he’s willing to entertain it

necessary precautions in countries where the United States wants to maintain a strategic presence — including the Philippines, a key player in responding to China’s rising power in the western Pacific.

The Visiting Forces Agreement ensures that the two countries have a predetermined process to be followed if a service member is arrested and charged with a crime, when tensions are likely to be high.

Upon leaving the Philippines on Sunday, Pemberton was brought to Camp Smith in Hawaii. “The Marine Corps is taking appropriate administrative action,” Perrine said. He was unable to indicate whether Pemberton will be demoted, or if he will be given a less-than-honorable discharge.

he rate of new cases is up 9% from last week, with a seven-day average of more than 43,000 cases nationwide.

"Rather than say, 'A second wave,' why don't we say, 'Are we prepared for the challenge of the fall and the winter?'" said Fauci, the nation's leading infectious disease expert.

More than 90% of the population remains susceptible to the virus, US Centers for Disease Control and Prevention Director Dr. Robert Redfield said this week.

Across the US, more than 6.9 million people have already been infected with the virus and at least 203,000 Americans have died, per Johns Hopkins data.

Cities, counties and states that have managed to bring their Covid-19 cases down should now work to prevent "surges that inevitably will occur if you're not doing the kinds of public health measures that we're talking about," according to Fauci.

While vaccines for Covid-19 are being tested, the growing skepticism around them is becoming an "enormous" problem,

If 95% of Americans wore masks, more than 95,000 lives could be saved by January, the IHME projects.

"If we listen to the public health measures, not only would we diminish the effect of Covid-19, we might get away with a very, very light flu season if we combine that with getting the flu vaccine," Fauci said.

"I don't want to seem preachy about it," he told New Jersey Gov. Phil Murphy during a livestream Thursday on Facebook. "But right now, the infections in the country are driven more by young people, 19 to 25."

About 12 states are now seeing mask usage rates above 50%, according to researchers from the University of Washington's Institute for Health Metrics and Evaluation (IHME).

It's a problem, Schaffner says, "because once we do develop a vaccine, obviously we want people to accept it, but there's growing skepticism ... in the general population."

US health experts have previously said it's likely many Americans will opt out of getting the Covid-19 vaccine once one is widely available.

And now 62% of Americans believe political pressure from the Trump administration will cause the US Food and Drug Administration to rush approval of a Covid-19 vaccine before Election Day, according to a new health tracking poll from the Kaiser Family Foundation.

"These are respected, trained people who are much better at models and statistics and all that other stuff than any of us are," he said during an online conversation with CNN Chief Medical Correspondent Dr. Sanjay Gupta organized by Emory University.

Infection numbers in Massachusetts are eight times what they were on Labor Day and hospitalizations have quadrupled.

In Illinois, the virus is now the third leading cause of death behind heart disease and cancer.

More than 250,000 Americans have so far died of the virus -- a higher death toll than any other country -- and a forecast by the US Centers for Disease Control and Prevention projects that number could rise up to 298,000 by December 12.

"It's all about absolute adherence to wearing a mask, avoiding crowds, and yes, we can keep the economy open but we're going to have to diminish indoor places like indoor dining and restaurants."

Only one US state, Hawaii, is showing a decrease in new cases greater than 10% compared to the previous week. Five others -- Idaho, North Dakota, Iowa, Illinois and Arkansas -- are holding steady, while the remaining 44 states are showing increases in new cases greater than at least 10% compared to the week prior.

the 7-day average of new cases is at its highest ever: 161,165 cases a day. That's up 27% compared to last week.

"Virtual gatherings remain the safest way to bring friends and family together from distant points. Outdoor settings can reduce the risks of gatherings with people outside of your household," the group said, also highlighting the importance of face coverings.

New Jersey Gov. Phil Murphy told CNN he wanted people to stay with their immediate family on Thanksgiving and to keep gatherings small -- "not just for next Thursday ... but for the next couple of months."

"This is not a normal year, it's not a normal Thanksgiving, Hanukkah, Christmas, New Year's. Folks have got to stay small, stay within the bubble of their own loved ones, and if we do that, that will be a down payment on a back-to-normal holiday season next year."

There were 79,410 hospitalizations reported on Wednesday, a record high for the United States, according to the Covid Tracking Project. The country is now averaging 72,120 hospitalizations over the last 7 days -- a 19.76% increase compared to last week.

"As a health care provider we are on 250 days of having a Covid patient in our ICU right now,"

"So every day, you walk into work, someone is super sick, someone is potentially dying that day."

"On a normal day, I don't have people dying every day," she said, adding that first week she had three people die in one day -- two of them, from Covid-19.

Students in the country's largest school district are transitioning to remote learning on Thursday following the closure of New York City schools. The decision came after the city's test infection rate reached 3%, a threshold Mayor Bill de Blasio said would trigger such a closure.

Kentucky Gov. Andy Beshear also announced new measures that will go into effect Friday, including limiting social gatherings to a maximum of two people from no more than two households, and prohibiting indoor service for restaurants and bars. And starting Monday, schools should begin remote learning, the governor said.

In Minnesota, the governor said the state is at a "breaking point" and announced a four-week dial back that will "help prevent more families from losing a loved one and ensure our hospitals can treat those who fall ill."

"As hospitals near the crisis of turning away new patients, continuing as things are is simply not sustainable," Gov. Tim Walz said.

A final analysis of the Phase 3 trial of Pfizer's Covid-19 vaccine shows it was 95% effective in preventing infections, even in older adults and caused no serious safety concerns, the company said Wednesday. It said it will seek a US Food and Drug Administration emergency use authorization "within days."

The Pfizer analysis came just days after a separate vaccine maker, Moderna, released early data showing its vaccine was about 95% effective.

Distribution is expected to begin within 24 hours after a vaccine receives the green light, according to Gen. Gustave Perna, who is helping oversee Operation Warp Speed.

"We'll be more ready next week, and if the vaccine is available, we have to go with what we have. We may not be perfect, but every day we're more prepared than we were the day before," he added.

often direct conflict of interest with his job as presiden

“Over the past decade, President Trump has paid tens of millions of dollars in personal taxes to the federal government, including paying millions in personal taxes since announcing his candidacy in 2015,” Mr. Garten said in a statement.

Ultimately, Mr. Trump has been more successful playing a business mogul than being one in real life.

An adverse ruling could cost him more than $100 million.

“There’s nothing to learn from them,” he told The Associated Press in 2016. There is far more useful information, he has said, in the annual financial disclosures required of him as president — which he has pointed to as evidence of his mastery of a flourishing, and immensely profitable, business universe.

Most of Mr. Trump’s core enterprises — from his constellation of golf courses to his conservative-magnet hotel in Washington — report losing millions, if not tens of millions, of dollars year after year.

He reported paying taxes, in turn, on a number of his overseas ventures. In 2017, the president’s $750 contribution to the operations of the U.S. government was dwarfed by the $15,598 he or his companies paid in Panama, the $145,400 in India and the $156,824 in the Philippines.

The leak of Mr. Nixon’s small tax payment caused a precedent-setting uproar: Henceforth, presidents, and presidential candidates, would make their tax returns available for the American people to see.

that he might release the returns if President Barack Obama released his birth certificate.

He often claims that he cannot do so while unde

r audit — an argument refuted by his own I.R.S. commissioner.

Throughout his career, Mr. Trump’s business losses have often accumulated in sums larger than could be used to reduce taxes on other income in a single year. But the tax code offers a workaround: With some restrictions, business owners can carry forward leftover losses to reduce taxes in future years. That provision has been the background music to Mr. Trump’s life.

“They say, ‘Trump is getting rich off our nation,’” he said at a rally in Minneapolis last October. “I lose billions being president, and I don’t care. It’s nice to be rich, I guess, but I lose billions.”

“consulting fees” as a business expense across nearly all of his projects.

Mr. Trump reduced his taxable income by treating a family member as a consultant, and then deducting the fee as a cost of doing business.

The “consultants” are not identified in the tax records. But evidence of this arrangement was gleaned by comparing the confidential tax records to the financial disclosures Ivanka Trump filed when she joined the White House staff in 2017. Ms. Trump reported receiving payments from a consulting company she co-owned, totaling $747,622, that exactly matched consulting fees claimed as tax deductions by the Trump Organization for hotel projects in Vancouver and Hawaii.

Hair stylists, table linens, property taxes on a family estate — all have been deducted as business expenses.

he ethical quandaries created by Mr. Trump’s decision to keep his business while in the White House have been documented. But the full financial measure of his extraordinary confluence of interests — a president with a wealth of business entanglements at home and in myriad geopolitical hot spots — has remained elusive.

how heavily he has come to rely on leveraging his brand in ways that pose potential or direct conflicts of interest while he is president.

he president’s conflicts have been most evident with Turkey, where the business community and the authoritarian government of President Recep Tayyip Erdogan have not hesitated to leverage various Trump enterprises to their advantage.

Some of the largest payments from business groups for events or conferences at Mar-a-Lago and other Trump properties have come since Mr. Trump became president, the tax records show.

Beyond one-time payments for events or memberships, large corporations also pay rent for space in the few commercial buildings Mr. Trump actually owns.

his barrage of derogatory remarks about immigrants quickly cost him two of his biggest and easiest sources of cash — licensing deals with clothing and mattress manufacturers that had netted him more than $30 million. NBC, his partner in Miss Universe — source of nearly $20 million in profits — announced that it would no longer broadcast the pageant; he sold it soon after.

each new acquisition only fed the downward draft on his bottom line.

He had paid no income taxes at all in 10 of the previous 15 years — largely because he reported losing much more money than he made.

Now, with his financial challenges mounting, the records show that he depends more and more on making money from businesses that put him in potential and often direct conflict of interest with his job as president.

The tax data examined by The Times provides a road map of revelations, from write-offs for the cost of a criminal defense lawyer and a mansion used as a family retreat to a full accounting of the millions of dollars the president received from the 2013 Miss Universe pageant in Moscow.

Indeed, his financial condition when he announced his run for president in 2015 lends some credence to the notion that his long-shot campaign was at least in part a gambit to reanimate the marketability of his name.

Donald Trump has not had a habit of attending church services weekly, though he made several appearances at the Episcopal church in West Palm Beach near his resort as well as at various evangelical churches across the country.

Barack Obama would go to church for the occasional Christmas or Easter service in Washington or on vacation in Hawaii, but rarely during the rest of the year. And George W. Bush, despite being a high-profile born-again Christian, tended to worship privately as president and only attended church when back home in Texas.

He fashioned himself as the candidate standing up for morality and decency, fighting for the soul of America and calling on the country to "embark on the work that God and history have called upon us to do."

He's open about and proud that he's a Catholic,"

"Joe's faith isn't just part of who he is," said Sen. Chris Coons, the Democrat from Delaware and a friend of Biden's. "It's foundational to who he is."

He attended Catholic schools and married his first wife, Neilia, in a Catholic church. He peppers his political speech with quotes from Scripture, Catholic hymns and references to the nuns and priests he learned from in school.

And while it's unclear whether he will adopt a permanent parish in Washington during his term, Biden's churchgoing will not only provide a window into his spiritual side. It will also be core to his political brand -- apparent not just in the pursuit of his policy agenda but even in his schedule as President.

Since childhood, Biden has been a regular at Mass. He frequently worships with family members, often attending with some of his grandchildren in tow.

While touring across the country in his presidential campaign, Biden would quietly slip into a local Catholic church for Mass -- often coming in a few minutes late or leaving a few minutes early, to avoid the rush. He was even spotted attending daily Mass on Election Day at his parish in Wilmington, Delaware.

On the day Biden was inaugurated as Vice President in 2009, he asked O'Brien to preside over a private Mass at Georgetown beforehand

These services, said the priest, reflected how important the Catholic faith and ritual were to Biden, particularly on two of the most joyful days of his life. But his faith in Christ and devotion to the church also bolstered Biden during his lowest moments.

The President-elect, who regularly wears his late son's rosary on his wrist, has publicly spoken about the role his faith has played in carrying him through grief.

"I'm not trying to proselytize, I'm not trying to convince you to be, to share my religious views. But for me it's important because it gives me some reason to have hope and purpose," Biden shared earlier this year during a CNN town hall with a grieving pastor who'd lost his wife during the Charleston shooting, explaining that he'd promised his own dying son that he would continue to stay engaged and not retreat into himself.

Catholics have become integrated into American public life to the point where Biden's religious affiliation is just another point in his biography. The last three Speakers of the House have been Catholics, and so are the majority of justices on the Supreme Court. Biden was the first Catholic to serve as vice president.

CNN's exit polls showed Catholics were nearly evenly split, with 52% supporting Biden and 47% supporting Trump. That's an improvement for Biden over Hillary Clinton's performance with Catholics four years ago, when she lost them to Trump 50% to 46%.

Ashley McGuire, a senior fellow at the conservative Catholic Association, said it will be difficult to separate Biden's liberalism on abortion and contraception from how he's viewed by Catholics -- especially because of how his campaign emphasized his faith.

"The issues where people have been the most divided and where the political left and the political right, and Catholics, have been so split are the issues where that department is going to be involved," McGuire said. "It was his move, and he sort of set a tone that suggests attack. And that's unfortunate."

"His faith is reflective of his compassion and empathy, his commitment to the vulnerable, and his service to the country," said O'Brien.

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.