Coalition Sues EPA Over Reversal of Key Climate Change Regulation

A man in a blue suit, white shirt, and pink patterned tie with an American flag pin stands against a plain light background, looking ahead with a neutral expression.

The recent legal confrontation between a coalition of health and environmental organizations and the Environmental Protection Agency (EPA) has drawn national attention. This coalition, which includes groups from Wisconsin, has filed a lawsuit challenging the EPA’s decision to revoke a pivotal scientific determination that has underpinned U.S. efforts to regulate greenhouse gas emissions and combat climate change.

The EPA’s recent rulemaking action rescinded the 2009 “endangerment finding,” a key declaration that identified carbon dioxide and other greenhouse gases as threats to public health and welfare. This finding has been the legal foundation for numerous climate regulations under the Clean Air Act, influencing standards for vehicles and industrial emissions.

Experts warn that this repeal could dismantle existing greenhouse gas emission standards for vehicles and pave the way for further deregulation of pollution controls on stationary sources such as power plants and oil facilities.

Katie Nekola, serving as general counsel for Clean Wisconsin, condemned the EPA’s action, describing it as “among the most destructive and irresponsible actions taken by the Trump EPA to date.” She criticized the agency for “ignoring its legal duty to protect our communities from the health harms of greenhouse gas emissions in its zealous pandering to big oil, gas and coal interests.” The coalition’s legal challenge, filed in the U.S. Court of Appeals for the District of Columbia Circuit, argues that the rescission is unlawful and undermines established climate safeguards.

Supporting the lawsuit, Brian Lynk from the Environmental Law & Policy Center stated, “This reckless and legally untenable decision creates immediate uncertainty for businesses, guarantees prolonged legal battles and undermines the stability of federal climate regulations.”

Trump Administration’s Justification

The lawsuit is backed by numerous organizations, including the American Public Health Association, American Lung Association, and Sierra Club, among others. It names the EPA and its administrator Lee Zeldin as defendants. President Donald Trump, in announcing the repeal, claimed it represented “the single largest deregulatory action in American history, by far.” Zeldin criticized the endangerment finding as “the Holy Grail of federal regulatory overreach.”

Environmental Protection Agency director Lee Zeldin speaks during an event with President Donald Trump to announce the EPA will no longer regulate greenhouse gases, in the Roosevelt Room of the White House, Thursday, Feb. 12, 2026, in Washington. AP Photo/Evan Vucci

Zeldin argued that the endangerment finding had resulted in “trillions of dollars in regulations that strangled entire sectors of the United States economy,” including the automotive industry. He stated that previous administrations used the finding to enforce climate policies that he claimed compromised consumer choice and affordability.

Impact of the Endangerment Finding

The 2009 endangerment finding by the EPA was a response to the Supreme Court’s decision in Massachusetts v. EPA, which classified greenhouse gases as “air pollutants” under the Clean Air Act. This finding led to the implementation of new standards aimed at reducing vehicle emissions and other pollution sources.

Environmental advocates argue that the evidence supporting the endangerment finding has only strengthened over the years. They highlight the EPA’s own analysis, indicating that repealing vehicle emission standards would elevate fuel costs for Americans.

Gretchen Goldman, president of the Union of Concerned Scientists, criticized the EPA’s actions, describing them as a “complete dereliction of the agency’s mission to protect people’s health and its legal obligations under the Clean Air Act.” She emphasized that the decision is “rooted in falsehoods, not facts, and is at complete odds with the public interest and the best available science.”

Several smokestacks from an industrial plant rise behind suburban houses and a neatly landscaped lawn under a partly cloudy sky.
The Kingston Fossil Plant smokestacks rise above the trees behind homes in Kingston Tenn Aug 7 2019 AP PhotoMark Humphrey File

Latest News