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carbon dioxide
Despite Trump-Musk Feud, CO2 Milestone Is the 'Important News of the Day'
Scientists said that atmospheric carbon dioxide concentrations peaked above 430 parts per million for the first time in perhaps 30 million years.
Jun 06, 2025
The concentration of carbon dioxide in the atmosphere peaked above 430 parts per million in 2025—the highest it has been in millions of years—according to data released by the National Oceanic and Atmospheric Administration and Scripps Institution of Oceanography at the University of California, San Diego on Thursday.
The news was overshadowed by the explosive feud between U.S. President Donald Trump and his erstwhile backer Elon Musk, but climate activist Bill McKibben argued that it was ultimately more consequential.
"In the long run, this is actually going to be the important news of the day—CO2 in the atmosphere passes another grim milestone," McKibben wrote on social media.
In the long run, this is actually going to be the important news of the day--co2 in the atmosphere passes another grim milestone
[image or embed]
— Bill McKibben (@billmckibben.bsky.social) June 5, 2025 at 4:33 PM
Carbon dioxide has been accumulating in the atmosphere due primarily to the human burning of fossil fuels, as well as by the clearing of forests and other natural carbon sinks. There, it acts as a greenhouse gas, trapping heat from the Earth, and is the primary gas responsible for the rise of global temperatures by approximately 1.1°C from the 1850 -1900 average. This warming has already had a host of dramatic impacts, from extreme weather events to sea-level rise to polar ice melt, and scientists warn these impacts will only accelerate under current energy policies, which put the world on track for around 3°C of warming by 2100.
The last time that atmospheric CO2 concentrations topped 430 ppm was most likely more than 30 million years ago, Ralph Keeling, who directs the Scripps CO2 Program, told NBC News.
"It's changing so fast," he said. "If humans had evolved in such a high-CO2 world, there would probably be places where we wouldn't be living now. We probably could have adapted to such a world, but we built our society and a civilization around yesterday's climate."
"While largely symbolic, passing 430 ppm should be a wake-up call."
Scripps and National Oceanic and Atmospheric Administration both measure carbon dioxide levels from NOAA's Mauna Loa Observatory in Hawaii, where Charles Keeling began taking measurements in 1958. As CO2 levels rise over time, they also follow a seasonal cycle—peaking in May before falling in the Northern Hemisphere summer and rising again in the fall.
This May, Scripps Oceanography calculated an average of 430.2 ppm for 2025, which is 3.5 ppm over the average for May 2024. NOAA's Global Monitoring Laboratory, meanwhile, calculated a monthly average of 430.5 ppm, a 3.6 ppm jump from the year before and the second-steepest yearly climb since 1958.
"Another year, another record," Keeling said in a statement. "It's sad."
The news comes two months after Mauna Loa daily measurements surpassed 430 ppm for the first time in March, which Plymouth Marine Laboratory professor Helen Findlay called "extremely disappointing and worrying."
"While largely symbolic, passing 430 ppm should be a wake-up call, especially given the accelerated response we are seeing of glaciers and ice sheets to current warming," Dr. James Kirkham, chief scientist of the Ambition on Melting Ice coalition of governments, said at the time.
"This upward trajectory is a direct result of continued fossil fuel use, likely exacerbated by emissions from extreme wildfires last year, methane leaks from fossil fuel extraction and possibly greater permafrost emissions, alongside decreased ability of very warm oceans to absorb CO2," Kirkham said.
The monthly record also comes a little more than a week after a United Nations report warned that there was a small chance global temperatures could surpass 2°C in at least 1 of the next 5 years, only a decade after world leaders pledged in the Paris agreement to keep global temperatures "well-below" that level.
"Carbon emissions are still rising, and the atmosphere is going to keep heating further until greenhouse gas concentrations stabilize," Matt Kean, who chairs Australia's Climate Change Authority, wrote in response to the Scripps and NOAA figures. "What sort of climate do we want to leave our children and those who come after them?"
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Arctic Tundra Has Turned From 'Carbon Sink to Carbon Source' in Dangerous Flip: NOAA
"This is yet one more sign, predicted by scientists, of the consequences of inadequately reducing fossil fuel pollution," said one scientist.
Dec 10, 2024
Permafrost in the Arctic has stored carbon dioxide for millennia, but the annual Arctic Report Card released by the National Oceanic and Atmospheric Administration reveals a concerning shift linked to planetary heating and a rising number of wildfires in the icy region: The tundra is now emitting more carbon than it is storing.
The report card revealed that over the last year, the tundra's temperature rose to its second-highest level on record, causing the frozen soil to melt.
The melting of the permafrost activates microbes in the soil which decompose the trapped carbon, causing it to be released into the atmosphere as planet-heating carbon dioxide and methane.
The release of fossil fuels from the permafrost is also being caused by increased Arctic wildfires, which have emitted an average of 207 million tons of carbon per year since 2003.
"Our observations now show that the Arctic tundra, which is experiencing warming and increased wildfire, is now emitting more carbon than it stores, which will worsen climate change impacts," said Rick Spinrad, administrator of NOAA. "This is yet one more sign, predicted by scientists, of the consequences of inadequately reducing fossil fuel pollution."
Sue Natali, a scientist at the Woodwell Climate Research Center in Massachusetts and one of 97 international scientists who contributed to the Arctic Report Card, told NPR that 1.5 trillion tons of carbon are still being stored in the tundra—suggesting that the continued warming of the permafrost could make it a huge source of planet-heating greenhouse gas emissions.
Along with the "Arctic tundra transformation from carbon sink to carbon source," NOAA reported declines in caribou herds and increasing winter precipitation.
The report card showed that the autumn of 2023 and summer of 2024 saw the second- and third-warmest temperatures on record across the Arctic, and a heatwave in August 2024 set an all-time record for daily temperatures in several communities in northern Alaska and Canada.
The last nine years have been the nine warmest on record in the Arctic region.
"Many of the Arctic's vital signs that we track are either setting or flirting with record-high or record-low values nearly every year," said Gerald (J.J.) Frost, a senior scientist with Alaska Biological Research, Inc. and a veteran Arctic Report Card author. "This is an indication that recent extreme years are the result of long-term, persistent changes, and not the result of variability in the climate system."
Brenda Ekwurzel, a climate scientist at the Union of Concerned Scientists, emphasized that the continuous release of fossil fuel emissions from oil and gas extraction and other pollution has caused the Arctic to warm at a faster rate than the Earth as a whole over the past 11 years.
"These combined changes are contributing to worsening wildfires and thawing permafrost to an extent so historic that it caused the Arctic to be a net carbon source after millennia serving as a net carbon storage region," said Ekwurzel. "If this becomes a consistent trend, it will further increase climate change globally."
The Arctic Report Card was released weeks before President-elect Donald Trump is set to take office. Trump has pledged to slash climate regulations introduced by the Biden administration and to increase oil and gas production. He has mused that sea-level rise will create "more oceanfront property" and has called the climate crisis a "hoax," while his nominee for energy secretary, Chris Wright, the CEO of the fracking company Liberty Energy, has claimed that climate warming is good for the planet.
"These sobering impacts in the Arctic are one more manifestation of how policymakers in the United States and around the world are continuing to prioritize the profits of fossil fuel polluters over the well-being of people and the planet and putting the goals of the Paris climate agreement in peril," said Ekwurzel. "All countries, but especially wealthy, high-emitting nations, need to drastically reduce heat-trapping emissions at a rapid pace in accord with the latest science and aid in efforts of climate-vulnerable communities to prepare for what's to come and help lower-resourced countries working to decrease emissions too."
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'Words Fail': WMO Report Finds CO2 Accumulating at Record Levels
"The report is very clear: This crisis is driven by the profit-driven production of coal, oil, and gas," one climate advocacy group said.
Oct 29, 2024
Climate-heating carbon dioxide is accumulating in the atmosphere more rapidly than at any time since humans evolved.
That's just one of the alarming findings from the World Meteorological Organization's (WMO) Greenhouse Gas Bulletin, released Monday, which found that all three main greenhouse gases reached record atmospheric levels in 2023.
"Words fail," the group Climate Defiance wrote on social media in response to the news.
"Greenhouse gas pollution at these levels will guarantee a human and economic trainwreck for every country, without exception."
Atmospheric concentrations of CO2 hit 420.0 parts per million (ppm) in 2023, an increase of 151% since the Industrial Revolution and a level not seen since 3 to 5 million years ago, when global temperatures was 2-3°C hotter than today and sea levels were 10-20 meters higher. Methane hit 1,934 parts per billion (ppb)—or 265% higher than preindustrial levels—and nitrous oxide rose to 336.9 ppb, 125% of pre-1750 levels.
"Another year. Another record," WMO Secretary-General Celeste Saulo said in a statement. "This should set alarm bells ringing among decision-makers. We are clearly off track to meet the Paris agreement goal of limiting global warming to well below 2°C and aiming for 1.5°C above preindustrial levels. These are more than just statistics. Every part per million and every fraction of a degree temperature increase has a real impact on our lives and our planet."
Carbon dioxide rose by 2.3 ppm in 2023. While that was higher than the 2022 increase, it was lower than in 2019-2021. However, on a longer-term scale, atmospheric CO2 rose by 11.4% in the past 10 years, a record increase during human existence. The burning of fossil fuels is the primary cause of this increase.
"The report is very clear: This crisis is driven by the profit-driven production of coal, oil, and gas," Climate Defiance wrote. "Because of these fuels, planet-heating pollution levels have gone up by 51.5%—since 1990 alone."
However, 2023's CO2 increases were also caused by forest fires—including a record-breaking fire season in Canada—as well as a possible reduction in the ability of Earth's natural carbon sinks to absorb the greenhouse gas. While vegetation-related CO2 emissions are partially influenced by natural cycles—El Niño years like 2023 are drier and tend to see more fires—they could also be a sign of dangerous feedback loops.
"The Bulletin warns that we face a potential vicious cycle," said WMO Deputy Secretary-General Ko Barrett. "Natural climate variability plays a big role in carbon cycle. But in the near future, climate change itself could cause ecosystems to become larger sources of greenhouse gases."
"Wildfires could release more carbon emissions into the atmosphere, whilst the warmer ocean might absorb less CO2. Consequently, more CO2 could stay in the atmosphere to accelerate global warming," Barrett explained. "These climate feedbacks are critical concerns to human society."
The report also said that even if emissions were to cease rapidly, the amount of carbon dioxide in the atmosphere means that the current rise in temperatures would linger for decades.
The rise in methane is also a concern. While it increased less in 2023 than in 2022, it hit a record-high increase over the last five years, and some of this could be due to climate feedback loops such as the melting of the Arctic permafrost or greater emissions from wetlands and other natural ecosystems as temperatures rise.
As Climate Defiance noted, WMO's graph showing the rise of methane appears to move from a linear to an exponential progression as it approaches 2023.
"It could literally be the graph that defines human history," Climate Defiance wrote.
"The most infuriating part is it didn't have to be this way," the group continued. "Had we started taking action in the 1970s—when the threat became clear—we could have easily stopped the crisis by now. Instead we gorged ourselves on SUVs and McMansions as politicians dithered and delayed."
The Greenhouse Gas Bulletin is one of several annual reports released ahead of United Nations climate conferences; this year, world leaders are scheduled to gather in Baku, Azerbaijan starting on November 11 for COP29. The Bulletin comes alongside other reports finding that national policies are not on track to reduce emissions in line with the Paris agreement temperature goals.
Last week, the U.N. Emissions Gap Report concluded that current policies put the world on course for as much as 3.1°C of warming. Also on Monday, the U.N. Framework Convention on Climate Change (UNFCCC) released its 2024 Nationally Determined Contributions (NDC) Synthesis Report, in which it assesses the commitments that different nations have made to reduce emissions under the Paris agreement.
It found that current NDCs would cut greenhouse gas emissions by 2.6% of 2019 levels by 2030, a far cry from the 43% needed to have a chance at limiting global heating to 1.5°C by 2100 and preventing ever-worsening climate impacts.
"Greenhouse gas pollution at these levels will guarantee a human and economic trainwreck for every country, without exception," U.N. Climate Change Executive Secretary Simon Stiell said in a statement of the current 2030 trajectory.
"Today's NDC Synthesis Report must be a turning point, ending the era of inadequacy and sparking a new age of acceleration, with much bolder new national climate plans from every country due next year," Stiell said. "The report's findings are stark but not surprising—current national climate plans fall miles short of what's needed to stop global heating from crippling every economy, and wrecking billions of lives and livelihoods across every country."
"By contrast," Stiell continued, "much bolder new national climate plans can not only avert climate chaos—done well, they can be transformational for people and prosperity in every nation."
Climate Defiance also called for renewed ambition.
"It is not too late," the group said. "There is still a small window of opportunity. Together, we will unite to stop our own demise. We will rise. We will defy all odds. There is no alternative."
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Look Up: The Scariest Part When We See the Big, Big, Big Picture
As a new study once more makes clear, raising the temperature is by far the biggest thing humans have ever done; our effort to limit that rise must be just as large.
Oct 23, 2024
This is “Climate week” in New York City, and my inbox has been awash recently in the latest press releases about start-ups and noble initiatives and venal greenwashing. Much of it’s important, and I’ll get to some of it later, but there’s a big new study that came out last week in Science that sets our crucial moment in true perspective. Let’s step back for a moment.
This new study—a decade in the making and involving, in the words of veteran climate scientist Gavin Schmidt “biological proxies from extinct species, plate tectonic movement, disappearance in subduction zones of vast amounts of ocean sediment, and interpolating sparse data in space and time”—offers at its end the most detailed timeline yet of the earth’s climate history over the last half-billion years. That’s the period scientists call the Phanerozoic—the latest of the earth’s four geological eons (we’re still in it), and the one marked by the true profusion of plant and animal life. It’s a lovely piece of science, and it’s lovely too because it reminds us of all we’re heir to in this tiny brief moment that marks the human time on earth. So staggeringly much—strange and extreme and fecund—has come before us.
But it’s also scary as can be, for two big reasons.
The first is that it shows the earth has gotten very very warm in the past. As the Washington Post explained in an excellent analysis yesterday, “the study suggests that at its hottest the Earth’s average temperature reached 96.8 degrees Fahrenheit (36 degrees Celsius).” Our current average temperature—already elevated by global warming to the highest value ever recorded—is about 60 degrees Fahrenheit, or 15 degrees Celsius. For most of the 500 million years the study covers, the earth has been in a hothouse state, with an average temperature of 71.6 Fahrenheit, or 22 Celsius, much higher than now. Only about an eighth of the time has the earth been in its current “coldhouse” state—but of course that includes all the time that humans have been around. It is the world we know and we’re adapted to.
In every era, it’s increases in carbon dioxide that drive the increases and decreases in temperature. “Carbon dioxide is really that master dial,” Jess Tierney, a climate scientist at the University of Arizona and co-author of the study, said. And so the study makes clear that the mercury could go very high indeed as humans pour carbon into the sky. We won’t burn enough coal and oil and gas to reach the very highest temperatures seen in the geological record—that required periods of incredible volcanism—but we may well double the amount of carbon in the atmosphere, and this study implies that the fast and slow feedbacks from that could eventually drive temperatures as much as eight degrees Celsius higher, which is more than most current estimates. Over shorter time frames the numbers are just as dramatic
Without rapid action to curb greenhouse gas emissions, scientists say, global temperatures could reach nearly 62.6 F (17 C) by the end of the century — a level not seen in the timeline since the Miocene epoch, more than 5 million years ago.
Now, you could look at those numbers and say: well, the earth has been hotter before, so life won’t be wiped out. And that’s true—there’s probably no way to wipe out life, though on a planet with huge numbers of nuclear weapons who knows. But these temperatures are much higher than anything humans have experienced, and they guarantee a world with radically different regimes of drought and deluge, radically different ocean levels and fire seasons. They imply a world fundamentally strange to us, with entirely different seasons and moods—and if that doesn’t challenge bare survival, it certainly challenges the survival of our civilizations. Unlike all the species that came before us, we have built a physical shell for that civilization, a geography of cities and ports and farms that we can’t easily move as the temperature rises. And of course the poorest people, who have done the least to cause the trouble, will suffer out of all proportion as that shift starts to happen.
But that’s not the really scary part. The really scary part is how fast it’s moving.
In fact, nowhere in that long record have the scientists been able to find a time when it’s warming as fast as it is right now. “We’re changing Earth’s temperature at a rate that exceeds anything we know about,” Tierney said.
Much much much faster than, say, during the worst extinction event we know about, at the end of the Permian about 250 million years ago, when the endless eruption of the so-called Siberian traps drove the temperature 10 Celsius higher and killed off 95 percent of the species on the planet. But that catastrophe took fifty thousand years—our three degree Celsius increase—driven by the collective volcano of our powerplants, factories, furnaces and Fords—will be measured in decades.
Our only hope of avoiding utter ruin—our only hope that our western world, in the blink of an eye, won’t produce catastrophe on this geologic scale—is to turn off those volcanoes immediately. And that, of course, requires replacing coal and gas and oil with something else. The only something else on offer right now, scalable in the few years we still have to work with, is the rays of the sun, and the wind that sun produces, and the batteries that can store its power for use at night.
Another new analysis this week, this one from the energy thinktank Ember, shows that 2024 is seeing another year of surging solar installations—when the year ends there will be 30% more solar power on this planet than when it began. Numbers like that, if we can keep that acceleration going for a few more years, give us a fighting chance.
That’s what all those seminars and cocktail parties and protests in New York over this week will ultimately be about—the desperate attempt to keep this rift in our geological history from getting any bigger than it must. As this new study once more makes clear, raising the temperature is by far the biggest thing humans have ever done; our effort to limit that rise must be just as large.
We need to stand in awe for a moment before the scope of earth’s long history. And then we need to get the hell to work.
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It's Bloody Hot and Deadly—and We Still Have No Climate Action Plan
To make a rapid, far-reaching, and unrelenting break with our fossil-fuel dependency, a national mobilization would be needed, and it would have to be a genuine all-of-society effort.
Jun 19, 2024
While April and May are usually the hottest months in many countries in Southeast Asia, hundreds of millions of people are now suffering in South Asia from an exceptionally intense heatwave that has killed hundreds. One expert has already called it the most extreme heat event in history. Record-breaking temperatures above 122°F were reported in the Indian capital of New Delhi, and temperatures sizzled to an unheard of 127°F in parts of India and Pakistan.
Nor was the blazing heat limited to Asia. Heatwaves of exceptional severity and duration are now occurring simultaneously in many areas of the world. Mexico and parts of the United States, notably Miami and Phoenix, have recently been in the grip of intense heat events. In southern Mexico, endangered howler monkeys in several states have been falling dead from trees in their tropical forests due to heat stroke and dehydration. Below-average rainfall throughout Mexico has led to water shortages in Mexico City and elsewhere. In some places, birds and bats, not to speak of humans, are also dying from the heat.
All of this is no coincidence. The hot and heavy hand of climate change is now upon us. Last year was the hottest on Earth in 125,000 years, and the concentration of heat-trapping carbon dioxide (CO2) in the atmosphere was the highest in 4 million years and still climbing at an ever-increasing rate. Meanwhile, global sea surface temperatures also reached a peak, causing severe massive coral bleaching in all three major ocean basins.
Had a foreign enemy inflicted the kind of damage caused by such floods, or the firestorms that swept California and the Pacific Northwest in 2020, or the hurricanes and droughts the nation has begun experiencing with increased frequency, the U.S. would have immediately mobilized for war.
The World Bank is projecting that, by 2050, there will be more than 200 million climate refugees, 20 times the 10 million refugees that have already destabilized Europe. Climate change is also putting an increasingly heavy burden on our social safety net, which could ultimately cause social order to begin to break down, generating chaos.
Nobel Prize-winning former Energy Secretary Steven Chu now claims it’s no longer possible to keep the global temperature from rising more than 1.5°C above the historical average, as the 195-nation signatories to the 2015 Paris climate agreement had hoped. In fact, he projects that the target of 2°C will also be broken and that, by 2050 the global temperature will have risen above 3°C. Nor is his pessimism unique. Hundreds of other scientists have recently forecast a strong possibility of hitting 2.5°C, which should hardly be surprising since, for well over 30 years now, global leaders have failed to heed the warnings of climate scientists by moving decisively to phase out fossil fuels and their heat-trapping gases.
What to make of such dire forecasts?
It could hardly be clearer that the world is already in the throes of a climate catastrophe. That means it’s high time for the U.S. to declare a national climate emergency to help focus us all on the disaster at hand. (Or as famed English poet Samuel Johnson put it centuries ago, “When a man knows he is to be hanged in a fortnight, it concentrates his mind wonderfully.”)
Such a declaration of a climate emergency is long overdue. Some 40 other nations have already done so, including 2,356 jurisdictions and local governments representing more than a billion people. Of course, a declaration alone will hardly be enough. As the world’s wealthiest and most powerful nation, and the one that historically has contributed the most legacy greenhouse gases to the atmosphere, the U.S. needs to develop a coherent exit strategy from the stranglehold of fossil fuels, a strategy that could serve as an international example of a swift and thorough clean-energy transition. But at the moment, of course, this country remains the world’s largest producer and consumer of oil and natural gas and the third largest producer of coal—and should former President Donald Trump win in November, you can kiss any possible reductions in those figures goodbye for the foreseeable future. Sadly enough, however, though the Biden administration’s rhetoric of climate concern has been strong, in practice, this country has continued to cede true climate leadership to others.
Despite the laudable examples of smaller nations like Iceland, Norway, Sweden, Paraguay, and Costa Rica that are already at, or within a percentage point or two, of being 100% powered by clean, renewable energy, the world sorely needs the U.S. as a global role model. To make a rapid, far-reaching, and unrelenting break with our fossil-fuel dependency—79% of the nation’s energy is now drawn from fossil fuels—a national mobilization would be needed, and it would have to be a genuine all-of-society effort.
National Mobilization Amid Crisis
Fortunately, there is a historical precedent for just such a comprehensive mobilization of government and citizenry in dire circumstances: former President Franklin Delano Roosevelt’s New Deal in the 1930s and the World War II years provide examples of the scale and intensity of the response needed today to reverse climate change. However, instead of gearing up to produce jobs for the unemployed or planes and tanks for a war, a concerted nationwide industrial effort is needed now to upgrade our electrical grid and produce millions of solar panels, wind turbines, batteries, carbon-capture machines, and zero-emission vehicles. All too sadly, this country and the world are now in a situation even more perilous than either the Great Depression or World War II.
Rising seas pose serious threats to major American cities, including Boston, Charleston, Miami, and New York, while, in recent years, millions of acres of the Midwest have been flooded by climate-related extreme weather events. Had a foreign enemy inflicted the kind of damage caused by such floods, or the firestorms that swept California and the Pacific Northwest in 2020, or the hurricanes and droughts the nation has begun experiencing with increased frequency, the U.S. would have immediately mobilized for war. Now, this country needs to do exactly that to face the climate crisis, but (even forgetting the horrifying possibility that Donald Trump could win the coming presidential election and sink any possibility of moving on climate change nationally for years to come) how to get our act together?
As French author Antoine de Saint-Exupéry wrote in his classic 1943 novella, Le Petit Prince, “A goal without a plan is just a wish.” In other words, a national climate action plan is urgently needed.
Left to its own devices, without strong public pressure, Congress might basically ignore or fail to enact legislation to implement the results of a National Climate Action Plan, especially if Congress were still controlled by the fossil-fuel-loving Republican Party.
In the Trump years of climate-science denial, any progress in controlling emissions resulted from actions by states, cities, and businesses or institutions. Over the long term, however, climate policy is far too important to be left to a hodgepodge of laws and policies haphazardly applied across some of our 50 states and thousands of cities and businesses. What this country needs is a plan guided by scientific and technical analysis and based on an ambitious but attainable set of greenhouse-gas-reduction quotas. Its point would not be to override the climate agendas of any city, state, or group, or the aspirations of the Green New Deal (House Resolution HR 109). It would simply be to provide a reliable toolkit of measures and policies along with analyses of their costs and benefits—a compass for getting to negative carbon emission as quickly and cost-effectively as possible.
This country today has no comprehensive climate action plan that proposes clear, enforceable targets, timelines, and roadmaps for climate protection and restabilization—and it desperately needs one. Call it America’s Energy Transition: Achieving a Clean Energy Future and imagine that it would build on previous authoritative studies, analyzing renewable-energy-generating and distribution technologies in terms of their costs, commercial readiness, resource constraints, and potential efficiency. It would formulate and model competing scenarios with clusters of complementary technologies, each requiring different policies for its implementation.
From such an exercise, Americans would learn how to achieve the greatest greenhouse gas reductions with the most speed and cost-effectiveness, as well as the fewest unwanted impacts, while best meeting this country’s ongoing energy needs. Such a study would also reveal the demands on natural resources of each scenario along with its costs and the manufacturing capacity required.
To build trust and engagement in the final plan, regional advisory councils made up of scientists, engineers, businesspeople, and major stakeholder representatives should be created to offer recommendations on how best to adapt such a plan to conditions in each part of the country. The final policy roadmap would then be designated as the “optimal energy path scenario” for the nation and provided to Congress, so that it could use the findings as a basis for funding and implementing new climate legislation.
Without Political Action, Don’t Hold Your Breath for a Bold Climate Plan
Left to its own devices, without strong public pressure, Congress might basically ignore or fail to enact legislation to implement the results of a National Climate Action Plan, especially if Congress were still controlled by the fossil-fuel-loving Republican Party. A Republican stranglehold on Congress and/or the White House would undoubtedly stymie both the creation of a national climate plan and the implementation of its findings, as well as the clean-energy transition it would facilitate.
To prevent such a setback from occurring, a strong popular constituency must be built nationwide capable of exerting powerful pressure on Congress to ensure the creation of a climate plan and the appropriate legislation to make it functional. Otherwise, no matter how sound the PR campaign on its behalf, serious political obstacles would stand in the way of its adoption, even by a Democratic Congress.
Through its lobbying, think tanks, public relations arms, and advertising, the politically and economically powerful fossil-fuel industry has, for decades, blocked meaningful climate legislation in both Democratic and Republican congresses. The creation of a powerful, broad coalition of constituencies—environmental, labor, public health, faith-based, and even progressive elements of the business community—could serve as a popular countervailing force against the mighty fossil-fuel industry. But as a first step, that coalition would need support, guidance, and a common accepted platform both to stand behind and to mobilize the public. The American environmental community could produce that platform. Yet this would not be a simple matter, due to the way that community is siloed, with each major organization catering to its own constituency, interests, and funders.
To create a common consensual vision around which the national climate movement could mobilize, a broad civil society gathering should be convened to attract the leadership of all environmental and climate action groups and set the stage for the National Climate Action Plan. That gathering would, of course, focus on the roadblocks to implementing such a plan and to a swift, national clean-energy transition—and how those roadblocks could be dismantled.
Put all of this together and you would have a nation mobilized against the fossil-fuel industry, ready to create a climate action plan and mobilize Americans in an all-of-society effort on behalf of slashing national carbon emissions in a radical fashion, accelerating a clean-energy transition, and protecting our endangered world. What more could you ask for?
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'Sad What We Are Doing': Global CO2 Increase Sets New All-Time Record
"I'd make this the lead story in every paper and newscast on the planet," said Bill McKibben. "If we don't understand the depth of the climate crisis, we will not act in time."
May 10, 2024
The average monthly concentration of carbon dioxide in the atmosphere jumped by a record 4.7 parts per million between March 2023 and March 2024, according to new data from NOAA's Mauna Loa Observatory in Hawaii.
The spike, reported by the University of California, San Diego's Scripps Institution of Oceanography on Wednesday, reveals "the increasing pace of CO2 addition to the atmosphere by human activities," the university said.
"I'd make this the lead story in every paper and newscast on the planet," author and long-time climate activist Bill McKibbenwrote on social media in response to the news. "If we don't understand the depth of the climate crisis, we will not act in time."
"Human activity has caused CO2 to rocket upwards. It makes me sad more than anything. It's sad what we are doing."
Scientists have been tracking rising CO2 concentrations from Mauna Loa since 1958, and their upward trajectory has come to be known as the "Keeling Curve," named for Charles Keeling, who began the measurements. The curve has become an important symbol of the climate crisis—making visible how the burning of fossil fuels and the clearing of vegetation has released more and more CO2 into the atmosphere, where it traps heat from escaping into space and raises global temperatures.
For most of human history, concentrations have hovered around 280ppm, and the curve's first measurement put them at 313. Sixty-five years later, C02 concentrations averaged 419.3 ppm in 2023, a level not seen since 4.3 million years ago when sea levels were around 75 feet higher and parts of today's Arctic tundra were forests. As of Wednesday, the Keeling Curve reported a daily concentration of 426.72 ppm.
The record jump from March 2023 to March 2024 surpasses the last record jump of 4.1 ppm from June 2015 to June 2016.
"We sadly continue to break records in the CO2 rise rate," Ralph Keeling, Charles' son who now directs the Scripps CO2 Program, said. "The ultimate reason is continued global growth in the consumption of fossil fuels."
The record leaps from both 2015-2016 and 2023-2024 were also influenced by active El Niño events. The El Niño phenomenon increases atmospheric carbon dioxide because it leads to warmer, drier temperatures in the tropics, which decrease vegetation and encourage fires. Atmospheric CO2 levels tend to rise especially quickly toward the end of an El Niño cycle, and last March's CO2 levels were unusually low, leading to a larger gap in the 12-month period.
This year's rate of increase during the current El Niño is significantly larger than the one that took place in 2016. As Scripps explained:
The increase from February 2023 to February of this year was 4.0 ppm, compared to 3.7 for the 2016 El Niño. The increase from January 2023 to January of this year was 3.4 ppm, compared to 2.6 for the 2016 El Niño.
The growth rate from April 2023 to April 2024 dropped to 3.6 ppm, but taking into account the first four months of 2024, the growth rate is well above that for 2016. If this El Niño follows the pattern of the last El Niño, the world might experience a very high growth rate for several more months, Keeling said.
However, any regular climate variations such as El Niño events occur over the longer-term rise in both fossil fuel emissions and greenhouse gas levels.
"The rate of rise will almost certainly come down, but it is still rising and in order to stabilize the climate, you need CO2 level to be falling," Keeling told The Guardian. "Clearly, that isn't happening. Human activity has caused CO2 to rocket upwards. It makes me sad more than anything. It's sad what we are doing."
Jeff Goodell, author of The Heat Will Kill You First, wrote in response, "We're riding the Venus Express."
The record jump in CO2 concentrations comes as 2023 was the hottest year both on record and in around 100,000 years. Of the 12 months covered by the March 2023 to March 2024 period, 10 of them (June through March) were the hottest of that month on record.
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Atmospheric Greenhouse Gas Concentrations Hit New Record Levels
"As these numbers show, we still have a lot of work to do to make meaningful progress in reducing the amount of greenhouse gases accumulating in the atmosphere," said one NOAA scientist.
Apr 06, 2024
The three most critical heat-trapping gases in Earth's atmosphere again reached record levels last year, the U.S. National Oceanic and Atmospheric Administration said Friday, underscoring the inadequacy of efforts to reduce greenhouse gas emissions amid the worsening climate emergency.
NOAA said the three most important human-caused greenhouse gases—carbon dioxide (CO2), methane, and nitrous oxide—"continued their steady climb during 2023."
While the levels of these heat-trapping gases did not rise "quite as high as the record jumps observed in recent years," the figures "were in line with the steep increases observed during the past decade."
"We're caught between a rock and a charred place."
Global surface CO2 concentrations averaged 419.3 parts per million (ppm) last year, an increase of 2.8 ppm. It was the 12th straight year in which worldwide CO2 concentrations rose by more than 2 ppm.
Atmospheric methane—which while not as abundant as CO2 is up to 87 times more potent over a 20-year period—increased by 10 parts per billion (ppb) to 1,922.6 ppb, while nitrous oxide rose by 1 ppb to 336.7 ppb.
"As these numbers show, we still have a lot of work to do to make meaningful progress in reducing the amount of greenhouse gases accumulating in the atmosphere," Vanda Grubišić, director of NOAA's Global Monitoring Laboratory, said in a statement.
According to NOAA:
The amount of CO2 in the atmosphere today is comparable to where it was around 4.3 million years ago during the mid-Pliocene epoch, when sea level was about 75 feet higher than today, the average temperature was 7°F higher than in pre-industrial times, and large forests occupied areas of the Arctic that are now tundra.
About half of the CO2 emissions from fossil fuels to date have been absorbed at the Earth's surface, divided roughly equally between oceans and land ecosystems, including grasslands and forests. The CO2 absorbed by the world's oceans contributes to ocean acidification, which is causing a fundamental change in the chemistry of the ocean, with impacts to marine life and the people who depend on [it]. The oceans have also absorbed an estimated 90% of the excess heat trapped in the atmosphere by greenhouse gases.
"Methane's decadal spike should terrify us," Rob Jackson, a Stanford University climate scientist who heads the Global Carbon Project—which tracks global emissions but wasn't part of the NOAA effort—told NBC News.
"Fossil fuel pollution is warming natural systems like wetlands and permafrost," Jackson added. "Those ecosystems are releasing even more greenhouse gases as they heat up. We're caught between a rock and a charred place."
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'Call to Action': CO2 Now at Levels Not Seen in 14 Million Years
"It really brings it home to us that what we are doing is very, very unusual in Earth's history," the lead author of a new study said.
Dec 08, 2023
The last time that levels of atmospheric carbon dioxide were as high as they are today, Greenland was free of ice and the savanna and grassland ecosystems where humans evolved didn't exist yet.
That's the conclusion of a study published in Science Friday, which researchers say compiles "the most reliable data available to date" on atmospheric carbon dioxide levels over the last 66 million years.
"It really brings it home to us that what we are doing is very, very unusual in Earth's history," lead author Baerbel Hoenisch of the Columbia Climate School's Lamont-Doherty Earth Observatory told Agence France-Presse.
"We've already pushed the atmosphere way beyond anything we've seen as a species."
By burning fossil fuels and clearing natural carbon sinks like forests, industrial capitalism has raised global carbon dioxide levels to 419 parts per million (ppm) today from around 280 ppm at the beginning of the industrial revolution.
"Rising atmospheric CO2 is the most obvious and startling expressions of our impact on the global environment," study corresponding author and University of Utah geologist Gabe Bowen wrote on social media. "The concentration has risen by ~50% in the past 100 years. Every year is now marked by the highest CO2 levels *ever observed* by humans!"
To understand how such a spike in carbon dioxide might impact Earth's climate and ecosystems, it's helpful to look at the past. This presents challenges, however, because the most reliable record of past carbon dioxide concentrations—gas bubbles preserved in ice cores—only goes back to around 800,000 years ago, when atmospheric concentrations of carbon dioxide were still at around preindustrial levels.
"Once you lose the ice cores, you lose direct evidence. You no longer have samples of atmospheric gas that you can analyze," Bowen said in a University of Utah press release. "So you have to rely on indirect evidence, what we call proxies. And those proxies are tough to work with because they are indirect."
Proxies are evidence in the geologic record that can stand in for carbon dioxide levels, such as mineral isotopes or the shape of fossilized leaves. Scientists have looked at these proxies before, but the current study represents the most comprehensive effort to date. A team of around 90 researchers from 16 countries spent seven years synthesizing and reviewing previous work under the banner of the Cenozoic CO2 Proxy Integration Project, according to the University of Utah and AFP.
The new study represents the scientific consensus on the carbon dioxide record, and it concludes that the last time carbon dioxide levels were around 419 ppm was 14 million years ago. That's much earlier than previous estimates of 3 to 5 million years ago.
However, the record goes back further than that to the Cenozoic Era, when the dinosaurs died and mammals began to emerge.
That record revealed a very clear pattern, Bowen tweeted: "CO2 goes up, the world warms. CO2 down, and things get icy."
The record enabled the scientists to predict the consequences of current and projected carbon dioxide levels.
"This is an incredibly important synthesis and has implications for future climate change as well, particularly the key processes and components of the Earth system that we need to understand to project the speed and magnitude of climate change," University of Utah biology professor William Anderegg said in the press release.
One of the report's messages, Bowen tweeted is that "the future is now."
"We've already pushed the atmosphere way beyond anything we've seen as a species," Bowen continued, "and if it stays this way we're in for big changes in the environment we live in."
If policy-makers don't restrict the burning of fossil fuels, atmospheric carbon dioxide could reach 600 to 800 ppm by 2100, AFP reported. According to the record, the last time levels were this high was 30 to 40 million years ago, when Antarctica was also ice-free and the Earth was home to giant insects.
Even today's concentrations are bound to have lasting consequences. For example, when carbon dioxide levels rapidly increased around 56 million years ago, it significantly altered ecosystems and took around 150,000 years to decrease again.
"We are in this for a very long time," Hoenisch told AFP, "unless we sequester carbon dioxide, take it out of the atmosphere, and we stop our emissions sometime soon."
However, the that doesn't mean the most extreme changes are locked-in. Instead, Bowen tweeted that the report was a "call to action."
"The geological changes we studied lasted for thousands and millions of years," Bowen said, "and if human-induced CO2 change is short-lived it won't have as big an impact on the climate."
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Emissions of Richest 1% Will Cause 1.3 Million Heat Deaths: Oxfam
"The super-rich are plundering and polluting the planet to the point of destruction and it is those who can least afford it who are paying the highest price."
Nov 20, 2023
The richest 1% of the global population produced 16% of the world's carbon dioxide in 2019, generating as much planet-warming pollution as the poorest two-thirds of humanity, according to a report released Monday by Oxfam International.
Climate Equality: A Planet for the 99% describes the fossil fuel-driven climate emergency and runaway inequality as "twin crises" that are leaving those least responsible for planetary breakdown to bear the worst consequences, from catastrophic extreme weather to food and water shortages.
"If no action is taken, the richest will continue to burn through the carbon we have left to use while keeping the global temperature below the safe limit of 1.5°C, destroying any chance of ending poverty and ensuring equality," the report warns. "The world needs an equal transformation. Only a radical reduction in inequality, transformative climate action and fundamentally shifting our economic goals as a society can save our planet while ensuring wellbeing for all."
Using the latest available emissions data from the Stockholm Environment Institute, Oxfam calculated that it would take roughly 1,500 years for a person in the bottom 99% to produce as much CO2 pollution as the world's top billionaires create in a year. The annual emissions of the global super-rich cancel out the emissions-reduction impact of nearly a million onshore wind turbines, according to the report.
The report also estimates that the emissions of the top 1% in 2019 will cause 1.3 million heat-related excess deaths in the coming decades, with most of the deaths occurring in the current decade.
Oxfam noted that transportation is far and away the largest source of pollution from the ultra-rich, whose private jets, yachts, and fleets of gas-guzzling cars are highly carbon-intensive. Experts at Indiana University estimated in 2021 that a "superyacht" emits more than 7,000 tons of CO2 per year.
Climate activists have also increasingly targeted private jet travel as a key source of luxury emissions. Oxfam observed in its new report that "a short trip on a private jet will produce more carbon than the average person emits all year."
The report comes in the wake of news from the World Meteorological Organization that global greenhouse gas concentrations reached an all-time high once again last year, underscoring the need for dramatic action to curb fossil fuel use and transition to renewable energy.
Chiara Liguori, Oxfam's senior climate justice policy adviser, said in a statement that "the super-rich are plundering and polluting the planet to the point of destruction and it is those who can least afford it who are paying the highest price."
"The huge scale of climate inequality revealed in the report highlights how the two crises are inextricably linked—fueling one another—and the urgent need to ensure the rising costs of climate change fall on those most responsible and able to pay," said Liguori.
"Governments globally, including the U.K., need to tackle the twin crises of inequality and climate change by targeting the excessive emissions of the super-rich by taxing them more," Liguori added. "This would raise much-needed revenue that could be directed to a range of vital social spending needs, including a fair switch to clean, renewable energy as well as fulfilling our international commitments to support communities who are already bearing the brunt of the climate crisis."
Oxfam's report calls on governments to pursue a "radical increase in equality" by imposing wealth taxes on the richest 1% as well as steep inheritance, land, and property taxes. The report also recommends taxing or banning private jet travel, space tourism, and other polluting luxury activities and imposing "permanent, automatic" windfall profit levies on major corporations that often take advantage of crises such as wars and pandemics.
Additionally, Oxfam urged governments to invest heavily in establishing universal programs—from healthcare to education to childcare—and transitioning away from fossil fuels. The group said that rich countries must honor their commitments to provide climate financing to poor nations facing the brunt of the climate crisis and support debt cancellation and other relief measures.
"Unless we rapidly reduce carbon emissions," the report states, "we will exhaust the amount of carbon we can emit without triggering climate breakdown within just five years."
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'Damning' Probe Finds 80% of Top Carbon Offset Schemes Are 'Likely Junk or Worthless'
Carbon offset projects are "proving a dangerous diversion of political capital and time from the meaningful and just solutions needed to rise to the challenge of the climate crisis," said one researcher.
Sep 20, 2023
A joint investigation published Tuesday by the watchdog group Corporate Accountability and The Guardian finds that nearly 80% of the leading carbon offset schemes backed by corporations and governments in a purported attempt to reduce planet-warming pollution should be deemed "likely junk or worthless."
Carbon offset projects are billed as a way for corporations, governmental bodies, and individuals to compensate for their emissions footprints by investing in efforts to curb pollution elsewhere. Environmentalists have long warned that carbon offset schemes—part of the so-called voluntary carbon market (VCM)—are a way for fossil fuel companies such as Chevron to justify continued oil and gas extraction.
Citing the emissions trading database AlliedOffsets, The Guardian noted Tuesday that "the 50 most popular global projects include forestry schemes, hydroelectric dams, solar and wind farms, waste disposal, and greener household appliances schemes across 20 (mostly) developing countries."
The new joint investigation finds that 39 of the top 50 carbon offset projects contain at least one "fundamental failing that undermines its promised emission cuts," making them "likely junk."
The analysis characterizes a project as "likely junk" if there's "compelling evidence, claims, or high risk that it cannot guarantee additional, permanent greenhouse gas cuts, among other criteria."
"In some cases, there was evidence suggesting the project could leak greenhouse gas emissions or shift emissions elsewhere," The Guardian explained. "In other cases, the climate benefits appeared to be exaggerated or the project would have happened independently—with or without the voluntary carbon market."
Rachel Rose Jackson, director of climate research and international policy at Corporate Accountability, said in a statement that "the findings are extremely damning of a scheme that the world's largest emitters repeatedly tout as a lynchpin in solving the climate crisis."
"The VCM is proving a dangerous diversion of political capital and time from the meaningful and just solutions needed to rise to the challenge of the climate crisis," said Jackson.
"We cannot afford to waste any more time on false solutions."
The investigation is just the latest research to cast serious doubt on the effectiveness of carbon offset initiatives as companies and governments around the world, including the United States, increasingly invest resources in unproven voluntary carbon trading schemes as they face mounting backlash for doing little to phase out fossil fuels.
Last week, Carbon Market Watch released an analysis from experts at the University of California, Berkeley showing that popular carbon offset projects focused on forest preservation exaggerate their emissions reductions and are ineffective at combating deforestation, a major threat to the climate.
In their investigation, Corporate Accountability and The Guardian pointed to a major forest conservation project in Zimbabwe that "was reported to have had so many exaggerated and inflated claims—and probably shifted emissions elsewhere—that it was described as 'having more financial holes than Swiss cheese.'"
"In the U.S., the most problematic project is the world's largest carbon capture and storage plant in Wyoming, which has benefited from generous taxpayer subsidies, but where the vast majority of the captured CO2 has been released into the atmosphere or sold to other fossil fuel companies to help extract hard-to-reach oil," The Guardian reported, citing the Institute for Energy Economics and Financial Analysis.
Anuradha Mittal, director of the Oakland Institute, told the newspaper that "the ramifications of this analysis are huge, as it points to systemic failings of the voluntary market, providing additional evidence that junk carbon credits pervade the market."
"We cannot afford to waste any more time on false solutions," Mittal added. "The issues are far-reaching and pervasive, extending well beyond specific verifiers. The VCM is actively exacerbating the climate emergency."
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