Trump Administration Revokes Foundational Climate Rule in Major Environmental Rollback
The Trump administration has executed its most aggressive anti-environmental action to date by dismantling the cornerstone of all United States climate regulations. On Thursday, officials revoked the 2009 endangerment finding, a landmark Obama-era rule that established greenhouse gases as a threat to public health and welfare, thereby authorising the Environmental Protection Agency (EPA) to control planet-heating pollution.
President Donald Trump hailed the repeal as "the single largest deregulatory action in American history," while EPA Secretary Lee Zeldin described it as ending "the holy grail of federal regulatory overreach." Zeldin asserted, "The endangerment finding, and the regulations that were based on it, didn't just regulate emissions. It regulated and targeted the American dream."
Origins and Implications of the Endangerment Finding
The endangerment finding originated from a 2007 Supreme Court ruling in Massachusetts v EPA, which affirmed the government's authority under the Clean Air Act to regulate greenhouse gas emissions from vehicles. In 2009, under President Barack Obama, the EPA formalised this by determining that six greenhouse gases endanger current and future generations, creating the legal bedrock for federal climate action.
By revoking this finding, the Trump EPA contends that a section of the Clean Air Act applies only to pollution with local or regional impacts, effectively voiding all federal greenhouse gas regulations for motor vehicles. Experts warn this will trigger a broader unravelling of climate rules. Andres Restrepo, a senior attorney at the Sierra Club, explained, "What they're basically doing is announcing a position that the Clean Air Act does not allow EPA to find that greenhouse gases endanger health and welfare. That will require them to end emissions standards for power plants, too."
Joseph Goffman, former EPA air chief under Joe Biden, anticipates the agency will extend its arguments to stationary polluters like power plants in coming months, describing the process as "a row of dominoes falling." This move could also jeopardise the US auto industry, as Adam Zuckerman of Public Citizen noted, pushing manufacturers to produce obsolete vehicles unsellable in global markets dominated by electric vehicles.
Economic and Health Consequences
The administration claims the repeal will save the US $1.3 trillion, but critics argue this ignores far greater costs from climate change impacts. The Environmental Defense Fund estimates additional expenses of up to $4.7 trillion over two decades due to climate-warming and toxic pollution. Jason Walsh of the BlueGreen Alliance stated, "Today's action by President Trump, if unchecked, will put more money in the pockets of CEOs who pollute our air... but it will put more regular folks in the hospital or force them to flee climate disasters."
An EPA spokesperson defended the action, saying, "Under President Trump, EPA is returning to common-sense policies and adhering to the law. That is how we keep dollars in the pockets of American families and protect human health and the environment, refusing to let any 'climate religion' trump the laws passed by Congress."
Legal Challenges and Future Outlook
Environmental groups, health organisations, and states like California and Connecticut have pledged to sue over the rollback, citing federal courts' repeated affirmations of the endangerment finding. Manish Bapna of the Natural Resources Defense Council declared, "This cynical and devastating action by the Trump EPA will not go forward without a fight. We will see them in court – and we will win."
Climate law expert Michael Gerrard expects litigation to begin soon in the DC circuit court, potentially reaching the Supreme Court within a year. He referenced the court's swift action in 2016 to stay Obama-era power plant rules, suggesting a rapid legal resolution is possible. The outcome could shape US climate policy for years, amid ongoing criticism that Trump's agenda favours fossil-fuel donors over public safety.
