Group items tagged

“why not go whole hog” (forgive me) “and advocate a strictly vegan diet?” Isn’t being a part-time vegan, the more strident demand, like being a little bit pregnant?

You might think of patterns of eating as falling on one point or another along a spectrum, and moving toward the plant-based end of that spectrum — as opposed to the end represented by Morgan Spurlock’s “super-sized” diet — is almost always beneficial.[7] It is about eating better, or well, not perfectly, and it must be said that “perfectly” has not yet been defined.

This much is known, now: We produce most animal products in deplorable conditions, and some of our health and environmental problems can be traced both to dominant production methods and our overconsumption. But we like to eat them, and they’re a pleasurable and even healthy part of many traditional diets and even sound agricultural practices.

His single largest policy accomplishment, the Affordable Care Act, combines two sweeping goals—providing coverage to the uninsured and taming runaway medical-cost inflation—that Democrats have tried and failed to achieve for decades. Likewise, the Recovery Act contained both short-term stimulative measures and increased public investment in infrastructure, green energy, and the like. The Dodd-Frank financial reform, while failing to end the financial industry as we know it, is certainly far from toothless, as measured by the almost fanatical determination of Wall Street and Republicans in Congress to roll it back.

Beneath these headline measures is a second tier of accomplishments carrying considerable historic weight. A bailout and deep restructuring of the auto industry that is rapidly being repaid, leaving behind a reinvigorated sector in the place of a devastated Midwest. Race to the Top, which leveraged a small amount of federal seed money into a sweeping national wave of education experiments, arguably the most significant reform of public schooling in the history of the United States. A reform of college loans, saving hundreds of billions of dollars by cutting out private middlemen and redirecting some of the savings toward expanded Pell Grants. Historically large new investments in green energy and the beginning of regulation of greenhouse gases. The Lilly Ledbetter Fair Pay Act for women. Elimination of several wasteful defense programs, equality for gays in the military, and consumer-friendly regulation of food safety, tobacco, and credit cards.

Of the postwar presidents, only Johnson exceeds Obama’s domestic record, and Johnson’s successes must be measured against a crushing defeat in Vietnam. Obama, by contrast, has enjoyed a string of foreign-policy successes

liberal melancholy hangs not so much on substantive objections but on something more inchoate and emotional: a general feeling that Obama is not Ronald Reagan.

In terms of lasting change, Obama probably has matched Reagan—or, at least, he will if he can win reelection and consolidate health-care reform and financial regulation and tilt the Supreme Court further left than he already has.

Black carbon is linked to asthma, cancer, emphysema, and heart and lung disease.

The movement of air pollutants associated with the production of goods in China for the American market has resulted in a decline in air quality in the Western United States

“Trade changes the location of production and thus affects emissions.”

“Dust, ozone and carbon can accumulate in valleys and basins in California and other Western states,” the statement said.

“outsourcing production to China does not always relieve consumers in the United States — or for that matter many countries in the Northern Hemisphere — from the environmental impacts of air pollution.”

in 2006, sulfate concentrations in the Western United States increased as much as 2 percent, and ozone and carbon monoxide levels also increased slightly because of the transportation of pollutants from emissions that resulted from the manufacture of goods for export to the United States.

The amount of air pollution in the Western United States resulting from emissions from China is still very small compared with the amount produced by sources in the United States that include traffic and domestic industries.

They estimated that in 2006, China’s exporting of goods to the United States was responsible for 7.4 percent of production-based Chinese emissions for sulfur dioxide, 5.7 percent for nitrogen oxides, 3.6 percent for black carbon and 4.6 percent for carbon monoxide.

. Coal-burning factories were the biggest sources of pollutants and greenhouse gases, which contribute to global warming.

“This is a reminder to us that a significant percentage of China’s emissions of traditional pollutants and greenhouse gas emissions are connected to the products we buy and use every day in the U.S. We should be concerned, not only because this pollution is harming the citizens of China, but because it’s damaging the air quality in parts of the U.S.”

So the overall percentages of economic output might not by themselves be fair indicators of the importance of exports to the Chinese economy.

Why, it is fair to ask, does the killing of 100,000 or more with conventional weapons elicit little more than a concerned shrug, while the killing of a relative few from poison gas is enough to trigger an intervention

16 million people died and 20 million were wounded during World War I

2 percent of the casualties and fewer than 1 percent of the deaths are estimated to have resulted from chemical warfare

1925 Geneva Protocol, which banned the use, though not the possession, of chemical and biological weapons

almost universally accepted and become an international norm. Syria, too, is a signatory

No Western army used gas on the battlefield during the global slaughter of World War II

Nazis were to gas noncombatant Jews, Gypsies and others.

Franklin D. Roosevelt stepped in and, in quiet diplomacy, “told the Japanese that we knew of the use and that there would be consequences.”

general revulsion against the use of poisons against human beings in warfare, going back to the Greeks,”

1675, when France and the Holy Roman Empire agreed in Strasbourg not to use poisoned bullets

1899 not to use “projectiles the sole objective of which is the diffusion of asphyxiating or deleterious gases,

few known instances of poison gas being used since 1925

first two cases, gas was used by authoritarian regimes against those they considered lesser races.

1935-36, Mussolini used several hundred tons of mustard gas in Abyssinia, now Ethiopia

1940-41, the Japanese used chemical and biological weapons widely in China

chemical weapons have been categorized as “weapons of mass destruction,”

American use of Agent Orange in Vietnam was widely criticized

only about 1 trillion tons of carbon can be burned and the resulting gas spewed into the atmosphere.

Just over half that amount has already been emitted since the beginning of the Industrial Revolution, and at current rates of energy consumption, the trillionth ton will be released around 2040, according to calculations by Myles R. Allen, a scientist at the University of Oxford and one of the authors of the new report. More than 3 trillion tons of carbon are still left in the ground as fossil fuels.

To keep using fossil fuels beyond the trillionth ton of emissions, companies would have to develop potentially expensive technology to capture carbon dioxide from emissions sources like power plants and store it underground.

But a considerable body of research suggests that in principle it could be done, and in the United States, the Obama administration is moving toward rules that would essentially require utilities to develop the technology if they want to keep burning coal to produce electricity. In response, the president’s Republican opponents have accused him of waging a “war on coal.”

The group has now issued five major reports, each of them finding greater certainty that the world is warming and greater likelihood that human activity is the principal cause. The new report finds a 95 to 100 percent chance that most of the warming of recent decades is human-caused, up from the 90 to 100 percent chance cited in the last report, in 2007.

“If current trends in carbon dioxide emissions continue, we will be pushing most of the ecosystems of the world into climatic conditions that they have not experienced for many millions of years,”

Dr. Mora and his students divided the earth into a grid, with each cell representing 386 square miles. Averaging the results from the 39 climate models, they calculated a date they called “climate departure” for each location — the date after which all future years were predicted to be warmer than any year in the historical record for that spot on the globe.

The results suggest that if emissions of greenhouse gases remain high, then after 2047, more than half the earth’s surface will experience annual climates hotter than anything that occurred between 1860 and 2005, the years for which historical temperature data and reconstructions are available.

climate departure for New York City will come in 2047, the paper found, plus or minus the five-year margin of error. But lower emissions would push that to 2072.

Under high emissions, the paper found a climate departure date of 2031 for Mexico City, 2029 for Jakarta and for Lagos, Nigeria, and 2033 for Bogotá, Colombia.

He was referring to warnings that assets worth trillions of dollars are at risk of being stranded, or rendered obsolete, including vast coal and oil deposits that will most likely have to be left in the ground if dangerous levels of global warming are to be prevented.

“I have come to believe that climate change is the existential issue of our age,” Mr. Rubin said. “I believe that investors should insist that companies disclose their risks, including the value of assets that could be stranded.”

“I actually do believe that we’re at a tipping point with the planet,” Mr. Paulson said in an interview at his home in Chicago. “A lot of things are going to happen that none of us are going to like to see.”

The campaign behind the new report, called Risky Business, is funded largely by three wealthy financiers who are strong advocates of action on global warming:

They commissioned an economic modeling firm that often does work for the oil and gas industry, the Rhodium Group, to assemble a team of experts who carried out the risk analysis. Trevor Houser, a Rhodium partner who led the study, sought to insulate the findings from the political opinions of the sponsors, in part by setting up a committee of leading climate scientists and environmental economists who reviewed the work.

Coastal counties, home to 40 percent of the nation’s population, will take especially large hits from the rise of the sea, which could swallow more than $370 billion worth of property in Florida and Louisiana alone by the end of the century.

the global sea level could increase roughly a foot by 2050, and double or triple that by century’s end. A rise of as much as six or eight feet cannot be entirely ruled out, but that is more likely in the next century.

Given that land is sinking in Louisiana even faster than the sea is rising, 4.1 percent to 5.5 percent of all insurable property in that state will be below mean sea level by 2050, the report predicted. By 2100, that figure could reach 15 percent to 20 percent. In Florida, 1 percent to 5 percent of all properties could fall below sea level by 2100, the report said.

the combination of heat and humidity projected for some regions, particularly the Southeast, at century’s end means that anyone working outside at certain times will face a high risk of life-threatening heat stroke.

And in the 22nd century, much of the eastern half of the country could face these conditions for weeks on end, the researchers predicted.

Both groups of scientists found that West Antarctic glaciers had retreated far enough to set off an inherent instability in the ice sheet, one that experts have feared for decades.

Those six glaciers alone could cause the ocean to rise four feet as they disappear, Dr. Rignot said, possibly within a couple of centuries. He added that their disappearance will most likely destabilize other sectors of the ice sheet, so the ultimate rise could be triple that.

The new finding appears to be the fulfillment of a prediction made in 1978 by an eminent glaciologist, John H. Mercer of the Ohio State University. He outlined the vulnerable nature of the West Antarctic ice sheet and warned that the rapid human-driven release of greenhouse gases posed “a threat of disaster.” He was assailed at the time, but in recent years, scientists have been watching with growing concern as events have unfolded in much the way Dr. Mercer predicted

The task may prove most challenging for India, which is struggling to lift more than half of its population of 1.25 billion out of poverty and to provide basic electricity to 300 million of them. But rich countries are intent that India not get stuck on a coal-dependent development path.

President Obama has endorsed the idea of a price on carbon — in the form of a tax, or a cap-and-trade system like California’s — and leaders of Canada, Chile, Ethiopia, France, Germany and Mexico endorsed the idea at the start of the Paris conference. But there was not nearly enough support to incorporate it into the Paris Agreement.

China, meanwhile, is investing so heavily in clean energy that some observers think its carbon emissions might have hit a peak — a milestone that China had promised to reach only by 2030.

Giza Gaspar Martins, an Angolan diplomat who represents the Least Developed Countries, which negotiated in Paris as a bloc, said of the accord: “This puts a system in place to do climate action, but we will have a lot of work to do.” Photo

“It is essential that the developing countries are able to transform their energy system before they develop a level of dependence on coal that we have in the industrialized countries,” said Jan Burck of the activist group Germanwatch.

The United States will be one of them; through careful legal craftsmanship, the Paris Agreement will not be considered as its own treaty under American law but rather as an extension of the United Nations Framework Convention on Climate Change, which the Senate ratified in 1992.

By May, the United Nations climate staff will update its estimate for the combined impact of the national pledges (now known as nationally determined contributions, the qualifying word “intended” having been dropped). Estimates of the first round of pledges suggested that, if carried out, they would still result in a rise of 2.7 to 3.5 degrees Celsius (4.9 to 6.3 degrees Fahrenheit) above preindustrial levels — far above the newly adopted goal of just 1.5 degrees Celsius.

But as the Paris Agreement is put into place, the front lines of the battle to stabilize the planet’s atmosphere will shift elsewhere. At the start of the talks, 20 governments pledged to double spending on clean-energy research and development over the next five years, while a coalition of business leaders led by Bill Gates vowed to invest billions on developing renewable energy.

Climate activists have long used a “power of the people” approach to promote sustainability and organize globally, and the world leaders who met here credited “civil society” for keeping up the pressure.“Now the work to hold them to their promises begins,” the American environmentalist and activist Bill McKibben wrote on Twitter, moments after the gavel fell on the Paris Agreement. “1.5? Game on.”

To achieve this goal, countries that signed on to the agreement promised that they would focus on cultivating clean, renewable energy sources and shift from the use of fossil fuels. They will also be required to report on their progress in reducing greenhouse gas emissions every five years.

The deal also commits countries to deliver $100 billion a year in aid for developing countries by 2020, with a promise to increase financing in the future.

In a preamble, the deal doubles down on a pledge made six years ago, that richer, industrialized countries will contribute at least $100 billion of aid a year to poorer nations to help them battle the effects of climate change by 2020. It also promises that countries will consider increases to that amount in the future.

So there may be many vested parties with a stake in the climate change deal -- but there are also a few key winners and losers. We take a look at them here:

According to the Internal Displacement Monitoring Centre's (IDMC) 2015 Global Estimates report, "an average of 26.4 million people per year have been displaced from their homes by disasters brought on by natural hazards" since 2008. These threatened populations are largely found in developing countries, which tend to be more vulnerable to rises in sea level, droughts, and floods.

The climate accord in Paris, however, have many in the developing world cheering.

According to President Obama, the targets are bold, but they also empower "businesses, scientists, engineers, workers, and the private sector -- investors -- to work together."

Mohamed Adow, senior climate change adviser from the disaster relief agency Christian Aid, told CBS News that this is one of the most important aspects of the COP21 accord: the promise provides poorer nations with the "assurance that the international community will not leave developing countries to deal with climate impact."

Some nations were not entirely satisfied with the final language -- there is still, after all, no legally binding provision that holds industrialized countries to this pledge for "adaptation" funds -- but nonetheless, Adow said, it gives significant hope to those countries hit especially hard with the threat of displaced citizens.

In fact, the aid money already seems to be flowing in light of the Paris negotiations: early this week, the U.S. promised to double its own aid to affected countries to $861 million as part of last-ditch efforts to push the climate deal through.

The effects of climate change in poor and developing nations also pose an increasing terror threat to the United States -- a connection that President Obama has made in the past, when he called global warming "an economic and security imperative" just weeks after the Nov. 13 attacks in Paris.

As Democratic presidential candidate Bernie Sanders explained it on CBS' "Face the Nation" in November: "If we are going to see an increase in drought, in flood, and extreme weather disturbances as a result of climate change, what that means is that people all over the world are going to be fighting over limited natural resources... When people migrate into cities and they don't have jobs, there's going to be a lot more instability, a lot more unemployment, and people will be subject to the types of propaganda that al Qaeda and ISIS are using right now."

Military reports have also viewed climate change as a "catalyst for conflict," and the Pentagon's Quadrennial Defense Review last year dubbed its effects as "threat multipliers" that ultimately lead to "conditions that can enable terrorist activity and other forms of violence."

But the climate change deal seeks to mitigate these possible conflict catalysts so that "countries that don't have the resources to address these problems head on, now will," Jon Powers, who served the Federal Chief Sustainability Officer and Special Advisor on Energy to the U.S. Army in the Obama Administration, told CBS News.

One important target put forth by the deal was to ensure that parties would "undertake rapid reductions thereafter in accordance with best available science, so as to achieve a balance between anthropogenic emissions by sources and removals by sinks of greenhouse gases in the second half of this century."

Here, the deal aims to strangle heavy carbon-emitting industries -- the "anthropogenic emissions" -- and cut down on total fossil fuels burned worldwide. Importantly, it's also a nod to investment in and development of new technologies that would remove carbon dioxide from the air.

U.S. Energy Secretary Ernest Moniz told CNBC in an interview, "We recognize fossil fuels will continue to be a part of the portfolio for quite a long time," but that the popularity of other power sources are on the rise.

"Wind energy has gone up by several fold just in the last five to six years," Moniz said, "and now (wind) provides about 4.5 percent of our electricity. You add that with solar, we're talking 5 percent."

Kathleen McLaughlin, the chief sustainability officer for Walmart, said in a statement that the company would "support the U.N.'s call for the U.S. corporate sector to commit to science-based targets to reduce emissions."

Ahead of the Paris summit, China -- the world's biggest coal consumer -- said it would aim to cut its greenhouse gas emissions by nearly two-thirds of its 2005 levels. In the past, international monitoring of those numbers would have been difficult to do, but the COP21 deal changes that.

The agreement holds nations accountable for reporting their progress on their climate goals in a global "stocktake" every five years starting in 2023. It also means countries will be monitoring, verifying and reporting their greenhouse gas emissions in a single accounting system.

According to one report released last month by the carbon investment think tank Carbon Tracker, fossil fuel companies could risk over $2 trillion dollars of current and future projects being left valueless as the market for fossil fuels narrows with recent global climate change action.

"the possibility of the presence of an Islamic State [ISIS] terror cell in Geneva."

"Owing to the repeated use by the enemy of asphyxiating gases in their attacks on our positions, I have been compelled to resort to similar methods," Sir John explained.

There were commanders on both sides who felt uncomfortable about this new weapon.

"I fear it will produce a tremendous scandal in the world... war has nothing to do with chivalry any more. The higher civilisation rises, the viler man becomes," wrote Gen Karl von Einem, commander of the German Third Army in France.

This research sheds interesting light on how humans have influenced and continue to influence the climate. It's a complicated relationship and our knowledge is always evolving.

He also suggests humans are more powerful than they realize. "The bottom line is that we are basically skipping a whole glacial cycle, which is unprecedented.

"In theory, the next ice age could be even further into the future, but there is no real practical importance in discussing whether it starts in 50,000 or 100,000 years from now," Andrey Ganopolski from the Potsdam Institute for Climate Impact Research said.

And Prof Chris Rapley, from University College London, added: "This is an interesting result that provides further evidence that we have entered a new geological [Epoch] - 'The Anthropocene' - in which human actions are affecting the very metabolism of the planet."

But McCain’s party was already well along in the process of becoming what it is today — a party that is not only completely dominated by climate deniers, but is hostile to science in general, that demonizes and tries to destroy scientists who challenge its dogma.

Oh, and what is supposed to be motivating the thousands of scientists perpetrating this hoax?

Take Trump’s dismissal of all negative information about his actions and their consequences as either fake news invented by hostile media or the products of a sinister “deep state.” That kind of conspiracy theorizing has long been standard practice among climate deniers, who began calling the evidence for global warming — evidence that has convinced 97 percent of climate scientists — a “gigantic hoax” 15 years ago.

What was the evidence for this vast conspiracy? A lot of it rested on, you guessed it, hacked emails.

In fact, when you review the history of Republican climate denial, it looks a lot like Trumpism. Climate denial, you might say, was the crucible in which the essential elements of Trumpism were formed.

The truth is that most prominent climate deniers are basically paid to take that position, receiving large amounts of money from fossil-fuel companies.

But after the release of the recent National Climate Assessment detailing the damage we can expect from global warming, a parade of Republicans went on TV to declare that scientists were only saying these things “for the money.”

climate scientists have faced harassment and threats, up to and including death threats, for years. And they’ve also faced efforts by politicians to, in effect, criminalize their work

There are three important morals to this story.

First, if we fail to meet the challenge of climate change, with catastrophic results — which seems all too likely — it won’t be the result of an innocent failure to understand what was at stake. It will, instead, be a disaster brought on by corruption, willful ignorance, conspiracy theorizing and intimidation.

Second, that corruption isn’t a problem of “politicians” or the “political system.” It’s specifically a problem of the Republican Party

Third, we can now see climate denial as part of a broader moral rot. Donald Trump isn’t an aberration, he’s the culmination of where his party has been going for years. You could say that Trumpism is just the application of the depravity of climate denial to every aspect of politics.

And there’s no end to the depravity in sight.

President Trump said in a Rose Garden speech that the United States would withdraw from the accord, fulfilling one of his frequently repeated campaign promises.

Nicaragua, however, was critical of the deal as insufficiently ambitious.

Nicaragua has now said, however, that it will endorse the deal.

Despite its widespread adoption, the future of the Paris accord has been thrown into doubt by the Trump administration’s decision to withdraw.

White House officials are set to travel to Germany next month for United Nations climate change discussions, effectively putting them in the position of negotiating a deal they have said they are leaving.

Under the terms of the agreement, the soonest any country can withdraw from the pact is Nov. 4, 2020. That is less than three months before the end of Mr. Trump’s current term in office

it faces the same daunting task that confronted Carl Bosch a century ago: How much can it bring costs down? And how fast can it scale up

They believe that over the next seven years they can bring expenses down to a level that would enable them to sell CO₂ into more lucrative markets. Air-captured CO₂ can be combined with hydrogen and then fashioned into any kind of fossil-fuel substitute you want. Instead of making bread from air, you can make fuels from air.

What Gebald and Wurzbacher really want to do is to pull vast amounts of CO₂ out of the atmosphere and bury it, forever, deep underground, and sell that service as an offset

companies like Climeworks face a quandary: How do you sell something that never existed before, something that may never be cheap, into a market that is not yet real?

It’s arguably the case, in fact, that when it comes to reducing our carbon emissions, direct air capture will be seen as an option that’s too expensive and too modest in impact. “The only way that direct air capture becomes meaningful is if we do all the other things we need to do promptly,” Hal Harvey, a California energy analyst who studies climate-friendly technologies and policies, told me

In short, the best way to start making progress toward a decarbonized world is not to rev up millions of air capture machines right now. It’s to stop putting CO₂ in the atmosphere in the first place.

If the nations of the world were to continue on the current track, it would be impossible to meet the objectives of the 2016 Paris Agreement, which set a goal limiting warming to 2 degrees Celsius or, ideally, 1.5 degrees. And it would usher in a world of misery and economic hardship. Already, temperatures in some regions have climbed more than 1 degree Celsius, as a report by the Intergovernmental Panel on Climate Change noted last October. These temperature increases have led to an increase in droughts, heat waves, floods and biodiversity losses and make the chaos of 2 or 3 degrees’ additional warming seem inconceivable

A further problem is that maintaining today’s emissions path for too long runs the risk of doing irreparable damage to the earth’s ecosystems — causing harm that no amount of technological innovation can make right. “There is no reverse gear for natural systems,” Harvey says. “If they go, they go. If we defrost the tundra, it’s game over.” The same might be said for the Greenland and West Antarctic ice sheets, or our coral reefs. Such resources have an asymmetry in their natural architectures: They can take thousands or millions of years to form, but could reach conditions of catastrophic decline in just a few decades.

To have a shot at maintaining a climate suitable for humans, the world’s nations most likely have to reduce CO₂ emissions drastically from the current level — to perhaps 15 billion or 20 billion metric tons per year by 2030; then, through some kind of unprecedented political and industrial effort, we need to bring carbon emissions to zero by around 2050

To preserve a livable environment we may also need to extract CO₂ from the atmosphere. As Wurzbacher put it, “if you take all these numbers from the I.P.C.C., you end up with something like eight to 10 billion tons — gigatons — of CO₂ that need to be removed from the air every year, if we are serious about 1.5 or 2 degrees.

Through photosynthesis, our forests take extraordinary amounts of carbon dioxide from the atmosphere, and if we were to magnify efforts to reforest clear-cut areas — or plant new groves, a process known as afforestation — we could absorb billions more metric tons of carbon in future years.

we could grow crops specifically to absorb CO₂ and then burn them for power generation, with the intention of capturing the power-plant emissions and pumping them underground, a process known as bioenergy with carbon capture and storage, or BECCS

Ever since the Industrial Revolution, human societies have produced an excess of CO₂, by taking carbon stores from deep inside the earth — in the form of coal, oil and gas — and from stores aboveground (mostly wood), then putting it into the atmosphere by burning it. It has become imperative to reverse the process — that is, take CO₂ out of the air and either restore it deep inside the earth or contain it within new surface ecosystems.

“It’s not about saying, ‘I want to plant a tree.’ It’s about saying, ‘We want to plant a billion trees.’

“We have to come to grips with the fact that we waited too long and that we took some options off the table,” Michael Oppenheimer, a Princeton scientist who studies climate and policy, told me. As a result, NETs no longer seem to be just interesting ideas; they look like necessities. And as it happens, the Climeworks machines on the rooftop do the work each year of about 36,000 trees.

air capture could likewise help counter the impact of several vital industries. “There are process emissions that come from producing iron and steel, cement and glass,” she says, “and any time you make these materials, there’s a chemical reaction that emits CO₂.” Direct air capture could even lessen the impacts of the Haber-Bosch processes for making fertilizer; by some estimates, that industry now accounts for 3 percent of all CO₂ emissions.

Wind and solar are now the cheapest forms of energy in the right locations,” Pacala says. “The return on those investments, if you calculated it, would blow the doors off anything in your portfolio. It’s like investing in early Apple. So it’s a spectacular story of success. And direct air capture is precisely the same kind of problem, in which the only barrier is that it’s too costly.”

what all the founders have in common is a belief that the cost of capturing a ton of carbon will soon drop sharply.

M.I.T.’s Howard Herzog, for instance, an engineer who has spent years looking at the potential for these machines, told me that he thinks the costs will remain between $600 and $1,000 per metric ton

He points out that because direct-air-capture machines have to move tremendous amounts of air through a filter or solution to glean a ton of CO₂ — the gas, for all its global impact, makes up only about 0.04 percent of our atmosphere — the process necessitates large expenditures for energy and big equipment. What he has likewise observed, in analyzing similar industries that separate gases, suggests that translating spreadsheet projections for capturing CO₂ into real-world applications will reveal hidden costs. “I think there has been a lot of hype about this, and it’s not going to revolutionize anything,

Climeworks’s current goal is to remove 1 percent of the world’s annual CO₂ emissions by the mid 2020s.

“Basically, we have a road map — $600, down to $400, down to $300 and $200 a ton,” Wurzbacher said. “This is over the next five years. Down to $200 we know quite well what we’re doing.” And beyond $200, Wurzbacher suggested, things get murkier.

To actually capture 1 percent of the world’s carbon emissions by 2025 would, by Gebald’s calculations, require that Climeworks build 250,000 carbon-capture plants like the ones on the roof at Hinwil. That adds up to about 4.5 million carbon collectors

The Climeworks founders therefore try to think of their product as the automotive industry might — a piece of mass-produced technology and metal, not the carbon they hope to sequester.

“Every CO₂ collector has about the same weight and dimensions of a car — roughly two tons, and roughly 2 meters by 2 meters by 2 meters,” Gebald said. “And all the methods used to produce the CO₂ collectors could be well automated. So we have the automotive industry as a model for how to produce things in large quantities for low cost.

n 1954, the economist Paul Samuelson put forward a theory that made a distinction between “private-consumption goods” — bread, cars, houses and the like — and commodities that existed apart from the usual laws of supply and demand.

the other type of commodity Samuelson was describing is something now known as a “public good,” which benefits everyone but is not bought, sold or consumed the same way

direct air capture’s success would be limited to the size of the market for private goods — soda fizz, greenhouse gas — unless governments decided to intervene and help fund the equivalent of several million (or more) lighthouses.

An intervention could take a variety of forms. It could be large grants for research to find better sorbent materials, for instance, which would be similar to government investments that long ago helped nurture the solar- and wind-power industries. But help could also come by expanding regulations that already exist.

The Climeworks founders told me they don’t believe their company will succeed on what they call “climate impact” scales unless the world puts significant prices on emissions, in the form of a carbon tax or carbon fee.

“Our goal is to make it possible to capture CO₂ from the air for below $100 per ton,” Wurzbacher says. “No one owns a crystal ball, but we think — and we’re quite confident — that by something like 2030 we’ll have a global average price on carbon in the range of $100 to $150 a ton.” There is optimism in this thinking

A company that sells a product or uses a process that creates high emissions — an airline, for instance, or a steel maker — could be required to pay carbon-removal companies $100 per metric ton or more to offset their CO₂ output. Or a government might use carbon-tax proceeds to directly pay businesses to collect and bury CO₂.

“It doesn’t cost too much to pump CO₂ underground,” Stanford’s Sally Benson says. Companies already sequester about 34 million metric tons of CO₂ in the ground every year, at a number of sites around the world, usually to enhance the oil-drilling process. “The costs range from $2 to $15 per ton. So the bigger cost in all of this is the cost of carbon capture.”

The weekend before, Gutknecht told me, he received 900 unsolicited inquiries by email. Many were from potential customers who wanted to know how soon Climeworks could bury their CO₂ emissions, or how much a machine might cost them.

A Climeworks app could be installed on my smartphone, he explained. It could then be activated by my handset’s location services. “You fly over here to Europe,” he explained, “and the app tells you that you have just burned 1.7 tons of CO₂. Do you want to remove that? Well, Climeworks can remove it for you. Click here. We’ll charge your credit card.

The vast and constant market demand for fuel is why Carbon Engineering has staked its future on synthetics. The world currently burns about 100 million barrels of oil a day.

“So let’s say you’d have to supply something like 50 million barrels a day in 2050 of fuels,” he said. “That’s still a monster market.”

Carbon Engineering’s chief executive, added that direct-air-capture synthetics have an advantage over traditional fossil fuels: They won’t have to spend a dime on exploration

our plants, you can build it right in the middle of California, wherever you have air and water.” He told me that the company’s first large-scale facility should be up and running by 2022, and will turn out at least 500 barrels a day of fuel feedstock — the raw material sent to refineries.

Climeworks recently joined a consortium of European countries to produce synthetic methane that will be used by a local trucking fleet. With different tweaks and refinements, the process could be adapted for diesel, gasoline, jet fuel — or it could be piped directly to local neighborhoods as fuel for home furnaces.

the new fuels are not necessarily cheaper. Carbon Engineering aspires to deliver its product at an ultimate retail price of about $1 per liter, or $3.75 per gallon. What would make the product competitive are regulations in California that now require fuel sellers to produce fuels of lower “carbon intensity.” To date this has meant blending gas and diesel with biofuels like ethanol, but it could soon mean carbon-capture synthetics too.

Since they’re made from airborne CO₂ and hydrogen and could be manufactured just about anywhere, they could rearrange the geopolitical order — tempering the power of a handful of countries that now control natural-gas and oil markets.

From an environmental standpoint, air-capture fuels are not a utopian solution. Such fuels are carbon neutral, not carbon negative. They can’t take CO₂ from our industrial past and put it back into the earth

Even so, these fuels could present an enormous improvement. Transportation — currently the most significant source of emissions by sector in the United States — could cease to be a net emitter of CO₂

“If you can do one carbon-capture facility, where Carbon Engineering or Climeworks can build a big plant, great. You need to do that 5,000 times. And to capture a million tons of CO₂ with direct air capture, you need a small power plant just to run that facility. So if you’re going to build one direct-air-capture facility every day for the next 30 years to get to some of these scenarios, then in addition, we have to build a new mini power plant every day as well.

It’s also the case that you have to address two extraordinary problems at the same time, Peters added. “To reach 1.5 degrees, we need to halve emissions every decade,” he said. That would mean persuading entire nations, like China and the United States, to switch from burning coal to using renewables at precisely the same time that we make immense investments in negative-emission technologies.

this would need to be done even as governments choose among competing priorities:

“The idea of bringing direct air capture up to 10 billion tons by the middle or later part of the century is such a herculean task it would require an industrial scale-up the likes of which the world has never seen,”

Pacala wasn’t pessimistic about making a start. He seemed to think it was necessary for the federal government to begin with significant research and investments in the technology — to see how far and fast it could move forward, so that it’s ready as soon as possible

Gebald and Wurzbacher seemed to regard the climate challenge in mathematical terms. How many gigatons needed to be removed? How much would it cost per ton? How many Climeworks machines were required? Even if the figures were enormous, even if they appeared impossible, to see the future their way was to redefine the problem, to move away from the narrative of loss, to forget the multiplying stories of dying reefs and threatened coastlines — and to begin to imagine other possibilities.

“Americans don’t really grasp how pollution impacts their lives,” said Drew Shindell, a professor of Earth science at Duke University and the study’s lead author. “You say, ‘My uncle went to the hospital and died of a heart attack.’ You don’t say the heart attack was caused by air pollution, so we don’t know. It’s still a big killer here. It’s much bigger than from people who die from plane crashes or war or terrorism, but we don’t see the link so clearly

The models calculated about 7 million deaths per year if governments fail to work toward zero emissions by the end of the century, starting today.

they “calculated the human health impacts of pollution exposure under each scenario all over the world — but focusing on results in major cities — using well-established epidemiological models based on decades of public health data on air-pollution related deaths,”

Shindell used an automaker’s problem with faulty ignition switches in 2014 to further illustrate his point. When the switches failed, more than 3 million recalls were involved and auto executives were summoned to Washington to testify before Congress. “But the combined tailpipes of automobiles kill dozens and dozens more people than faulty ignition switches,” the researcher said. “We should be far more worried about pollution than the things we actually worry about.

“There’s got to be a significant amount of progress within the 2020s or it’s too late,” Shindell said. Even for the researchers, it’s a pie-in-the-sky goal, given that South Asian nations such as India, where pollution is among the worst in the world, argue correctly that their per-capita use is small compared with historical use in the Western Hemisphere and that they should be allowed time to develop just as other countries did.

hat urgency is at odds with the stance of the Trump administration, which has rolled back several Obama-era environmental regulations and incentivized the production of fossil fuels. Trump also has said he plans to withdraw the nation from the Paris climate accord and questioned the science of climate change just last month, saying on CBS’s “60 Minutes” that “I don’t know that it’s man-made” and that the warming trend “could very well go back.”

“This report draws a direct connection between the warming atmosphere and the resulting changes that affect Americans' lives, communities, and livelihoods, now and in the future,” the document reads, concluding that “the evidence of human-caused climate change is overwhelming and continues to strengthen, that the impacts of climate change are intensifying across the country, and that climate-related threats to Americans' physical, social, and economic well-being are rising.

The report finds that the continental United States already is 1.8 degrees Fahrenheit warmer than it was 100 years ago, surrounded by seas that are on average nine inches higher and being racked by far worse heat waves than the nation experienced only 50 years ago. But those figures offer only the prelude to even more potentially severe impacts. The report suggests that by 2050, the country could see as much as 2.3 additional degrees of warming in the continental United States. By that same year, in a high-end global-warming scenario, coral reefs in Hawaii and the U.S. Pacific territories could be bleaching every single year — conditions in which their survival would be in severe doubt. A record-warm year like 2016 would become routine.

In another major step, the authors of the new report have begun to put dollar signs next to projected climate damage, specifically within the United States. In a worst-case climate-change scenario, the document finds, labor-related losses by the year 2090 as a result of extreme heat — the sort that makes it difficult to work outdoors or seriously lowers productivity — could amount to an estimated $155 billion annually. Deaths from temperature extremes could take an economic toll of $141 billion per year in the same year, while coastal property damage could total $118 billion yearly, researchers found

Of course, mitigating climate change would also mitigate this damage, by as much as 58 percent in the case of high-temperature related deaths, the report finds.

The categorical tone of the new assessments reflects scientists' growing confidence in the ability to detect the role of a changing climate in individual extreme events, such as heat waves and droughts. At the same time, increasingly sophisticated computer simulations now allow them to project future changes in highly specific regions of the country

The Second State of the Carbon Cycle Report, which examines all of North America (not just the United States), finds that over a decade, greenhouse-gas emissions from fossil fuels declined by 1 percent per year. The result is that while North America emitted 24 percent of the world’s emissions in 2004, that was down to 17 percent in 2013. This occurred in part thanks to improvements in vehicle fuel efficiency, the growth of renewable energy and the swapping of coal-burning for natural gas.

“For the globe, we’re still going up, but regionally, there have been these changes in how humans have been acting that have caused our emissions to go down,” said Ted Schuur, a Northern Arizona University expert on permafrost carbon

The report concludes that it appears possible to for economies to grow — at least in the United States, Mexico and Canada — without increasing overall emissions of greenhouse gases. That would be an important signal for the ability of the world to slow climate change over the course of the century