More than a thousand climate scientits are aepealing Trump’s endangerment finding, warning that it is “contrary to science and the public interest.”

1,000+ Experts Rip EPA for ‘Reckless
Dismissal of Established Climate Science’
Jessica Corbett / Common Dreams

(September 16, 2025) — More than 1,000 scientists and other experts on Tuesday sent a letter to US Environmental Protection Agency Administrator Lee Zeldin explaining why they “strenuously object” to his effort to repeal the EPA’s 2009 “endangerment finding,” which has enabled federal climate regulations over the past 15 years.

Amid mounting fears that he would take such action, Zeldin in late July unveiled the rule to rescind the landmark legal opinion that greenhouse gases endanger public health and the welfare of the American people—part of Republican President Donald Trump’s broader pro-polluter agenda.

“As climate scientists, public health experts, and economists, we can attest to the indisputable scientific evidence of human-caused climate change, its harmful impacts on people’s health and well-being, and the devastating costs it is imposing on communities across the nation and around the world,” states the new letter, organized by the Union of Concerned Scientists. “This explicit attempt to undermine or weaken these findings, as well as the critical regulations linked to them, is contrary to science and the public interest.”

“We also strongly oppose the EPA’s reckless dismissal of established climate science as part of its proposal to repeal the endangerment finding, including the agency’s heavy reliance on an unscientific study commissioned by the Department of Energy. This report is rife with inaccuracies, deliberately cherry-picks and mischaracterizes data, and has not undergone a rigorous scientific review process,” the letter continues, echoing an expert review of the government report from earlier this month.

Citing major US and global analyses, along with thousands of independent, peer-reviewed scientific studies, the letter stresses that “the scientific evidence on human-caused climate change and its consequences was unequivocal in 2009 and, since that time, has become even more dire and compelling.”

It says that “based on the best available science,” scientists know:

• Climate change poses severe harms to human health and well-being;
• Climate change is clearly increasing the likelihood of extreme events; and
• The economic toll of climate change is rising.

Harms to human health and well-being include higher rates of heat-related deaths, increased spread of some infectious diseases, and decreased food and water safety due to climate-fueled extreme weather events, the letter says. It also highlights that, according to data from the National Oceanic and Atmospheric Administration (NOAA), “billion-dollar disasters in the United States are on the rise, driven by a combination of climate factors and increased development in disaster-prone areas.”

Despite such findings, the Trump administration is making various moves to boost the planet-wrecking fossil fuel industry and the president withdrew the United States from the Paris Agreement—again—when he returned to office in January. Parties to the 2015 climate agreement aim to limit global temperature rise this century to 1.5°C above preindustrial levels.

“The world stands on the cusp of breaching the 1.5°C (2.7°F) mark on a long-term basis, the global average temperature increase above preindustrial levels that scientists have long warned about,” the experts noted Tuesday. “Communities across the nation are already dealing with devastating and costly climate impacts, that are set to worsen as global warming accelerates. Humanity’s window to act to stave off some of the worst impacts of climate change is fast closing; any further delay is harmful and costly.”

“We urge you to stop dismantling critical climate regulations and evading EPA’s responsibility by pushing disinformation about climate science and impacts,” they concluded. “Instead, we call on you to act with urgency to help address this pressing challenge by limiting heat-trapping emissions. People across the nation are relying on the EPA to fulfill its mission to protect public health and the environment.”

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