The EPA’s 2009 Endangerment Finding has underpinned almost all U.S. efforts to reduce greenhouse gas emissions, making it a prime target for the Trump administration’s rollback of climate policies. A day-one executive order included a directive to review the “legality and continuing applicability” of the finding. On March 12, the EPA announced that it would potentially rescind the Finding, and the announcement was formalized with a proposed rule on July 29. 

Repealing the Finding would undo more than a decade of work that has made American communities healthier, skies clearer of smog and other pollution, and contributed to the country’s decreasing carbon emissions.

What is the Endangerment Finding?

The Endangerment Finding is a pivotal determination by the EPA, issued in response to the 2007 U.S. Supreme Court Case Massachusetts vs. EPA. In that case, the court held that the EPA has the authority to regulate greenhouse gases under the Clean Air Act, and that after it has made a finding of endangerment, the agency cannot refuse to regulate these gases.

Additionally, the EPA found that greenhouse gases in the atmosphere are both a hazard to public health and that motor vehicle emissions contribute to this pollution. In the years since, the EPA has built on the original ruling and issued subsequent endangerment findings relating to aircraft and utility emissions under other provisions of the Clean Air Act .

Why is the Endangerment Finding important?

As a result, the Endangerment Finding has become the legal foundation for essentially all federal regulation of greenhouse gas emissions in the U.S. – including motor vehicle tailpipe emissions and power plant rules.

The EPA’s proposed rule would repeal all greenhouse gas emissions standards for light-duty, medium-duty, and heavy-duty vehicles and engines, and would preempt any state fuel efficiency or vehicle emissions laws or regulations. Furthermore, this repeal could be a foundation for undoing greenhouse gas emissions regulations on stationary sources like power plants or oil and gas facilities.

The Endangerment Finding is based on sound science

The attempt to repeal the Endangerment Finding is emblematic of the current administration’s disregard for scientific consensus around the causes and impacts of climate change. 

The original finding draws from expertise at the U.S. Global Change Research Program, the Intergovernmental Panel on Climate Change (IPCC), and the National Academies of Sciences. It examined public health and public welfare in the U.S., with a focus on air quality, food production and agriculture, forestry, water resources, sea level rise and coastal areas, energy, infrastructure, and settlements, and ecosystems and wildlife. The EPA received over 380,000 public comments, the majority of which provided support for the Finding.

In 2018, Dr. Philip Duffy, then-president of Woodwell Climate Research Center, led a review of the scientific foundation of the Endangerment Finding. That work, published in the journal Science, found that “for each of the areas addressed in the EF, the amount, diversity, and sophistication of the evidence has increased markedly, clearly strengthening the case for endangerment. New evidence about the extent, severity, and interconnectedness of impacts detected to date and projected for the future reinforces the case that climate change endangers the health and welfare of current and future generations.”

What’s next for climate policy?

The legal validity of the administration’s proposed rule was contested almost immediately and challenges will likely continue to roll in even if the rule is made official. 

The EPA has extended a public comment period on this topic through September 22, 2025. The recently released Department of Energy (DOE) report, A Critical Review of Impacts of Greenhouse Gas Emissions on the U.S. Climate, which challenges scientific consensus by claiming that carbon dioxide-induced warming appears to be less damaging economically than commonly believed, serves as a foundation for the EPA’s proposed rule. That report is also open for public comment through September 2, 2025.  

The National Academy of Sciences has fast-tracked its scientific review of the impacts of greenhouse gases on human health in order to inform the decision within the comment period, and has requested contributions from scientists and experts in the fields of public health, extreme weather, climate modeling, agriculture, and infrastructure. Woodwell Climate is contributing to the opportunities for public comment and scientific engagement to aid future consideration of this, and similar, proposals in courts and encourages members of the public to do the same.

At Fort Stewart-Hunter Army Airfield in Georgia, dozens of people in uniform position themselves along the edge of a pine stand as multiple aircraft approach overhead and a helicopter starts dropping incendiary devices into the forest in front of them. This may sound like a military training exercise but it is not. It is the NASA FireSense campaign, co-led in partnership with the Department of Defense and the U.S. Forest Service, a carefully planned and coordinated set of scientific experiments being used to better understand wildfires.

As wildfires get more frequent, intense, and destructive due to human activity, scientists are coming up with new and creative ways to study them. This is what brought me to this collaborative project at Fort Stewart in March 2025 for a week of prescribed burns and intensive wildfire research.

I’m an ecologist at Woodwell Climate Research Center working to understand how climate change is altering wildfires in boreal forests and the Arctic. I improve ecosystem models— computer software programs that simulate how ecosystems work— to better predict wildfire under a changing climate. This requires a holistic understanding of wildfires: from the way plants grow and produce fuels, to the weather that leads to fires, to how fires spread and grow.  For me, getting out in the field is an important way to confirm that my computer simulations are behaving like real fires.

Wildfires can be a difficult and dangerous environment in which to do research. For this reason, wildfire research is sometimes done during prescribed fires. Prescribed or controlled burns are lit by trained professionals to reduce the buildup of natural fuels and to benefit plants and wildlife, especially in ecosystems that historically had regular wildfires. Fort Stewart has one of the largest prescribed fire programs in the United States, burning around 115 thousand acres every year. Burns are performed both to protect soldiers from wildfires that can easily start during military training exercises, as well as to manage the base’s pine forests for the recovery of several threatened and endangered species including the red-cockaded woodpecker and the smooth coneflower. This makes it a great location to do research. Unlike wildfires, controlled burns allow researchers to know exactly when and where a fire will occur, giving them time to plan safe research projects.

This most recent experimental burn campaign represents a new level of cooperative effort to study wildland fire at all stages. While the Environment and Natural Resources Division Forestry Branch at Fort Stewart conducted the prescribed burns, researchers from NASA and seven DoD Strategic Environmental Research and Development (SERDP) funded research projects deployed weather stations, fire sensors, cameras, and emberometers on the ground. NASA flew three aircraft overhead with advanced sensors aimed at the fire below and a radar truck monitored the smoke plume. Fuels were measured with LIDAR scanners before and after the fires to detect what burned. During the fire, fuel moisture was measured. The ability to study conditions before, during, and after a fire gives a more complete picture of fire behavior compared to a wildfire where researchers are often limited to data gathered after the threat of the fire has passed. 

Working together like this makes for more than just good science, it also builds community. Like all scientists, wildfire researchers tend to be specialized, with some studying fuels, while others study smoke, or the energy produced by the flames. Bringing these people together allows them to share ideas, discuss problems, and learn new experimental techniques. These connections and conversations are what spark new ideas and collaborations that push science forward.  For me this was a valuable opportunity to meet other researchers, discuss ideas, and to learn how to perform experiments safely in a fire, something that could help me improve my wildfire models in the future.

The FireSense campaign at Fort Stewart went off without a hitch. The data collected during the campaign will take many months to analyze, but the hope is that this campaign will act as a model for a new era of cooperative wildfire research. Planning for another campaign next year in Florida is already under way and in the meantime I’ve returned to my lab to refine my code and apply what I’ve learned in preparation for the next fire.

Woodwell Climate is pleased to announce the appointment of Thomas (Tod) J. Hynes III as Chair of the Board of Directors, as well as the addition of three new board members, Jainey Bavishi, Jean A. Rogers, and Aniket Shah. The new directors began their three-year terms in June.

Hynes succeeds C. Gail Greenwald, who served as Chair of the Board from 2022 to 2025. Over the last two decades, Hynes has started and invested in over 20 companies in the climate and energy space.

Jainey Bavishi is a climate resilience expert who has led efforts across federal, local, and nonprofit sectors including serving in the Biden administration as Assistant Secretary of Commerce for Oceans and Atmosphere and Deputy Administrator of the National Oceanic and Atmospheric Administration. Jean Rogers, founder of the Sustainability Accounting Standards Board (SASB), is a respected global leader in the measurement and management of environmental impacts associated with sustainable development and financing the energy transition and climate solutions. Aniket Shah has spent his career at the intersection of global finance, economic development, and climate change. He leads a research and advisory effort on energy transition and sustainable business efforts at Jefferies.

“I’m excited and grateful that these incredibly impressive individuals will be sharing their talents with us,” said Woodwell President and CEO, Max Holmes. “They bring tremendous energy, expertise, and insight and we are fortunate to have them join the Woodwell team.” 

Bavishi, Rogers, and Shah replace Joseph J. Mueller and Stephanie Tomasky, who recently concluded their tenure.

About Tod Hynes
Hynes is a Senior Lecturer at MIT where he teaches a graduate course called Climate & Energy Ventures and advises the MIT Climate & Energy Prize which he also co-founded. He also serves as a Senior Advisor for Climate & Energy at the Martin Trust Center for MIT Entrepreneurship. Hynes is the CEO and Co-founder of Maigent, a company creating private AI tools that help experts amplify their skills and securely manage their information. He also founded Clymate Studios to help others help the climate. 

About Jainey Bavishi
Bavishi is a distinguished expert in the field of climate adaptation and resilience. She most recently served as the Assistant Secretary of Commerce for Oceans and Atmosphere and Deputy Administrator of the National Oceanic and Atmospheric Administration, guiding national efforts on climate resilience, marine conservation, and the implementation of major federal investments under the Bipartisan Infrastructure Law and Inflation Reduction Act. Previously, she directed the New York City Mayor’s Office of Climate Resiliency and served in the Obama White House as Associate Director for Climate Preparedness. Earlier in her career, she led initiatives on disaster risk reduction in the Asia Pacific and supported equitable recovery efforts on the Gulf Coast.

About Jean Rogers
Rogers has spent her career integrating sustainability into mainstream investment analysis. Under her leadership of the Sustainability Accounting Standards Board, the organization created standards enabling investors to benchmark sustainability performance across 80 industries. Most recently, she was Blackstone’s Senior Managing Director and ESG Chairperson where she oversaw the firm’s integration of sustainability factors into asset management while serving on the investment committees for certain private equity and private credit funds deploying more than $12B globally toward energy transition and climate solutions. She is currently an operating advisor to private equity funds such as Pegasus and Palistar Capital. Rogers began her career as an environmental engineer for Arup leading sustainable development projects throughout the US, Europe, and Asia. 

About Aniket Shah
Shah is Founder, Managing Director and Global Head of Sustainability, Transition and Washington Strategy at Jefferies where he leads a research and advisory effort for investors, corporates, and sovereigns on their energy transition and sustainable business efforts and advises clients on the interface between public policy and investment decision-making. He is also an Adjunct Assistant Professor at Columbia University’s School of International and Public Affairs. Shah previously held prominent roles at UBS, OppenheimerFunds, and Investec Asset Management, and in the public sector at the UN Sustainable Development Solutions Network and the Earth Institute at Columbia University.

Thirty-two thousand years ago this spring, in the eastern interior of Alaska, during an ice age so severe that the Laurentide Ice Sheet covered most of the continent of North America a mile thick, a Gwich’in man, dressed in neatly tailored, tanned, caribou skin pants and a shirt, walked around the forested edge of a lake, dragging a stick through the tall grass. At the end of the stick flickered a flame that leapt to the grass. The snow in the shadows of the trees blocked the fire’s path, so the flames could travel only into the dead grass that had accumulated, thinning some of the dead willows out in its maw.

Read more on Wildfire Magazine

Despite a warming climate, disruptive winter cold spells still invade the U.S., and a new study helps explain why. Researchers found that two specific patterns in the stratospheric polar vortex, a swirling mass of cold air high above the Arctic, can steer extreme cold to varying regions of the country. One pattern drives Arctic air into the northwestern U.S., and the other into central and eastern areas. Since 2015, the Northwest has experienced more of these cold spells owing to a shift in stratospheric behavior tied to a warming climate – more proof that what happens in the Arctic doesn’t stay in the Arctic.

As winters in the United States continue to warm on average, extreme cold snaps still manage to grip large swaths of the country with surprising ferocity. A new study offers a powerful clue: the answer may lie more than 10 miles above our heads, in the shifting patterns of the stratosphere.

The research reveals how two specific patterns in the stratospheric polar vortex—a high-altitude pool of frigid air over the Arctic encircled by a band of strong west winds—can contribute to bone-chilling weather events across regions of North America. The patterns are described as “stretched” because the vortex is elongated relative to its typical, more circular shape. One such pattern reinforces intense cold in the northwestern US, while the other variation takes aim at central and eastern states. Both patterns are associated with changes in how atmospheric waves, in both the stratosphere and lower atmosphere, can alter the jet stream and allow Arctic air to penetrate far southward.

“Understanding the stratosphere’s fingerprints on changing weather patterns–particularly the counterintuitive connections between a warming globe and extreme cold weather events–could improve long-range forecasting, allowing cities, power grids, and agriculture to better prepare for winter extremes,” said Dr. Jennifer Francis.

When I started at Woodwell Climate, I had very little personal or professional experience with boreal wildfire. I was a forest ecologist drawn to this space by the urgency of the climate crisis and the understanding that northern ecosystems are some of the most threatened and critical to protect from a global perspective. More severe and frequent wildfires from extreme warming are burning deeper into the soil, releasing ancient carbon and accelerating permafrost thaw. Still largely unaccounted for in global climate models, these carbon emissions from wildfire and wildfire-induced permafrost thaw could eat up as much as 10% of the remaining global carbon budget. More boreal wildfire means greater impacts of climate change, which means more boreal wildfire. But when I joined the boreal fire management team at Woodwell, the global picture was the extent of my perspective.

This past June, under a haze of wildfire smoke with visible fires burning across the landscape, Woodwell Climate’s fire management team made our way back to Fort Yukon, Alaska. Situated in Yukon Flats National Wildlife Refuge at the confluence of the Yukon and Porcupine Rivers, this region is home to Gwich’in Athabascan people who have been living and stewarding fire on these lands for millennia. Our time there was brief, but it was enough to leave us humbled by the reality that the heart of the wildfire story—both the impacts and the solutions—lie in communities like Fort Yukon. 

We listened to community members and elders tell stories about fire, water, plants, and animals, all of which centered around observations of profound change over the past generation. As we shared fire history maps at the Gwichyaa Zhee Giwch’in tribal government office, we were gently reminded that their knowledge of changing wildfire patterns long preceded scientists like us bringing western data to their village. We learned that fire’s impact on critical ecosystems also affects culture, economic stability, subsistence, and traditional ways of life. Increasing smoke exposure threatens the health of community members, particularly elders, and makes the subsistence lifestyle harder and more dangerous. A spin on the phrase “wildland urban interface,” Woodwell’s Senior Arctic Lead Edward Alexander coined the phrase “wildland cultural interface,” which brilliantly captures the reality that these fire-prone landscapes, culture, and community are intertwined in tangible and emotional ways for the Gwich’in people.

“There’s too much fire now” was a common phrase we heard from people in Fort Yukon. Jimmy Fox, the former Yukon Flats National Wildlife Refuge (YFNWR) manager had been hearing this from community members for a long time, along with deep concerns about the loss of “yedoma” permafrost, a type of vulnerable permafrost with high ice and carbon content widespread throughout the Yukon Flats. With the idea originating from a sharing circle with Gwich’in Council International, in 2023 Jimmy enacted a pilot project to enhance the fire suppression policy of 1.6 million acres of yedoma land on the Yukon Flats to explicitly protect carbon and climate, the first of its kind in fire management policy. He was motivated by both the massive amount of carbon at risk of being emitted by wildfire and the increasing threats to this “wildland cultural interface” for communities on the Yukon Flats. 

Ever since I met Jimmy, I have been impressed by his determination to use his agency to enact powerful climate solutions. Jimmy was also inspired by a presentation from my postdoctoral predecessor, Dr. Carly Phillips, who spoke to the fire management community about her research showing that fire suppression could be a cost-efficient way to keep these massive, ancient stores of carbon in the ground. Our current research is now focused on expanding this analysis to explicitly quantify the carbon that would be saved by targeted, early-action fire suppression strategies on yedoma permafrost landscapes. This pilot project continues to show the fire management community that boreal fire suppression, if done with intention and proper input from local communities, can be a climate solution that meets the urgency of this moment.

“Suppression” can be a contentious word in fire management spaces. Over-suppression has led to fuel build up and increased flammability in the lower 48. But these northern boreal forests in Alaska and Canada are different. These forests do not have the same history of over-suppression, and current research suggests that the impacts of climate change are the overwhelming driver of increased fire frequency and severity. That said, fire is still a natural and important process for boreal forests. The goal with using fire suppression as a climate solution is never to eliminate fire from the landscape, but rather bring fires back to historical or pre-climate change levels. And perhaps most importantly, suppression is only one piece of the solution. The ultimate vision is for a diverse set of fire management strategies, with a particular focus on the revitalization of Indigenous fire stewardship and cultural burning, to cultivate a healthier relationship between fire and the landscape.

The boreal wildfire problem is dire from the global to local level. But as I have participated in socializing this work to scientists, managers, and community leaders over the past year, from Fort Yukon, Alaska to Capitol Hill, I see growing enthusiasm for solutions that is not as widely publicized as the crisis itself. I see a vision of Woodwell Climate contributing to a transformation in boreal fire management that has already begun in Indigenous communities, one that integrates Indigenous knowledge and community-centered values with rigorous science, and ends with real reductions in global carbon emissions. Let’s begin.

Last month in Dakar, Senegal, Woodwell Climate Associate Scientist Glenn Bush and Forests & Climate Change Coordinator Joseph Zambo facilitated a high-level workshop with the Democratic Republic of Congo’s Director of Climate Change, Aimé Mbuyi, lead scientist on the country’s Nationally Determined Contributions (NDC) reporting process, Prof. Onesphore Mutshaili, and project consultant Melaine Kermarc. The goal of the workshop was to begin generating a clear set of priorities for the next 5 years for stepping up the ambition of the country’s NDCs, and to discuss strategies for monitoring and reporting on emissions.

Under the Paris Agreement, each country is required to submit to the UN Framework Convention on Climate Change a detailed description of their emissions reduction commitments and then regular reports on progress. Currently, DRC has pledged to reduce emissions by 21% by 2030, focusing on reform in their energy, agriculture, forestry, and other land use sectors. While NDCs are intended to represent a country’s highest possible ambition, DRC is looking to step up further. Officials are at work developing a plan to reach net-zero emissions, which would place the country among the leaders of climate policy in Africa.

In order to do this, DRC needs a reliable framework for measuring and monitoring emissions, so that progress can be accurately reported on. At the workshop, Bush, Mbuyi, Zambo, Kermarc  and Mutshaili discussed ways to strengthen the NDC reporting process. Among the top needs identified was stronger institutional scientific capacity, increased coordination and data sharing, and more funding and awareness of the process at local and provincial levels.

“High quality data is essential to building a high integrity NDC,” says Bush. “Improving the scope and quality of data available to monitor carbon will not only help the country meet the highest tier of reporting standards, but also access performance-based payment mechanisms to help finance the transition to a low emissions economy.” 

Through their conversations about challenges and opportunities, the group identified three areas for intervention that will help the country navigate towards a stronger emissions reduction plan. These recommendations were outlined in a report on the workshop proceedings.

  1. Improved governance and policy management: Establishing a National Climate Change Council to better integrate climate policy into national development plans.
  2. Science-backed carbon accounting and budgeting: Developing credible data standards for measuring emissions and ecosystem services to support transparent and effective reporting on climate performance. 
  3. Cross-sectoral integration: Promoting emissions reductions across all sectors through collaborative partnerships, particularly in the field of climate-smart agriculture and carbon payment mechanisms. 

Mr Aimé Mbuyi, Head of the Climate Change Division (CCD) at the DRC’s Ministry of the Environment and Sustainable Development, declared that “these recommendations reflect an important set of practical steps to move from aspiration to operational reality in order to increase the financing and impact to conserve our forests and stimulate sustainable development in the DRC”.

Woodwell Climate Research Center has been a long time partner of the Ministry of Environment and Sustainable Development. The Center is assisting the ministry in laying the technical foundations to support the NDC improvement process and helping build in-country scientific capacity to make a net-zero emissions plan a reality. This and other partnerships will be essential in transitioning the DRC to a low-carbon economy.

“We appreciated the long-standing trust that has developed over years of formal and informal collaboration on climate policy,” said Mbuyi. “The scientific partnership with Woodwell is invaluable to us at CCD, providing actionable information that has proven essential to advancing the climate mitigation and adaptation agenda.”

While the annual climate Conference of Parties (COP) each fall is the largest and most visible event of the global climate effort, international climate action happens all year long. Each June, United Nations Framework Convention on Climate Change (UNFCCC) holds a preparatory conference in Bonn, Germany. These summer climate meetings, often referred to in shorthand as “Bonn,” bring together up to 7000 delegates for the nitty gritty work of international cooperation.

At Bonn, government delegations negotiate the full range of issues surrounding global climate collaboration, scientific organizations present their latest findings, civil society groups advocate for climate action, and diverse coalitions showcase their efforts. The June meetings lay the groundwork for decisionmaking and collaboration at the upcoming COP, and often give a clear indication of the challenges to come in the fall negotiations. This year, from June 16 to 26, conversations at Bonn spanned topics including the development of indicators for global resilience, clarifying how the world should pursue the global energy and forestry related targets agreed on at COP 28, mobilizing climate finance, increasing countries’ ambition for emissions reduction, and ensuring a just global transition away from fossil fuels. 

This year’s summer meetings proved a tough one for governments attempting to move forward on nearly every issue, though delegates did manage to achieve clarity on the decisionmaking agenda for the upcoming COP30, to be held in Belém, Brazil in November. In the science realm, the UNFCCC launched a systematic mapping of what research needs are currently being met by the scientific community and where there are still gaps in actionable information. 

Beyond the intergovernmental negotiations the conference included a wide range of events and activities by observer organizations. A Woodwell Climate delegation was in attendance again this year, taking part in some of the key activities of the conference. Here are 3 highlights from The Center’s engagement at this year’s June climate meetings.

On top of substantive agenda items, participants tried to grapple with the logistical issues arising around the conference in Belém, with affordability and accessibility being particularly acute concerns for non-governmental organizations and Global South participants. Despite the questions remaining on this front, the outcomes from this June’s climate meetings have built the foundations for a pivotal COP30 agenda— at a time when ambitious climate action couldn’t be more important.