EPA rescinds 2009 endangerment finding, stripping federal tailpipe climate rules

The Environmental Protection Agency announced the formal revocation of the 2009 greenhouse gas endangerment finding, a foundational determination that carbon dioxide and five other greenhouse gases endanger public health and welfare. The final action, announced at the White House on Feb. 12, 2026, eliminates the legal predicate that has allowed the federal government to set greenhouse gas standards for new motor vehicles and engines under the Clean Air Act.

EPA’s own rule summary, published as a proposed rule last year, framed the endangerment finding as a prerequisite under Section 202 of the Clean Air Act. Without it, the agency said, it would lack statutory authority to prescribe standards for greenhouse gas emissions from new motor vehicles and new motor vehicle engines. The rule package put forward for public comment in late July 2025 proposed removing greenhouse gas regulations for light-, medium-, and heavy-duty on-highway vehicles. The agency received an unusually large volume of feedback during the comment period: more than 570,000 submissions were filed and about 30,000 were posted to the federal docket.

The administration framed the change as a sweeping deregulatory victory. White House Press Secretary Karoline Leavitt said, “On Thursday, President Trump will be joined by Administrator Lee Zeldin to formalize the rescission of the 2009 Obama-era endangerment finding. This will be the largest deregulatory action in American history, and it will save the American people $1.3 trillion in crushing regulations.” At the announcement, EPA Administrator Lee Zeldin said, “Today, the Trump EPA has finalized the single largest act of deregulation in the history of the United States of America, referred to by some as the holy grail of federal regulatory overreach. The 2009 Obama EPA endangerment finding is now eliminated.” President Donald Trump added, “This is a big one if you’re into the environment, this is about as big as it gets.”

Industry allies hailed the decision. Dustin Meyer, senior vice president for policy, economics and regulatory affairs at the American Petroleum Institute, praised the move and said, “Today’s action appropriately ends the previous administration’s EV mandates, which effectively banned new gas-powered vehicles and represented a clear case of regulatory overreach at the expense of American consumers.” Environmental advocates and many state and local officials vowed to resist. Dan Becker, director of the Center for Biological Diversity’s Safe Climate Transport Campaign, called the reversal an “assault on science and our health” and said, “The Trump administration justifies this assault on science and our health by falsely claiming that U.S. climate-heating pollution doesn’t matter and that it lacks the authority to cut it. That’s a lie, and any 6-year-old knows it’s wrong to lie.” Former President Barack Obama wrote on X that without the finding “we’ll be less safe, less healthy and less able to fight climate change, all so the fossil fuel industry can make even more money.”

The rollback removes federal greenhouse gas standards covering vehicle model years 2012 to 2027 and beyond, the administration said, and could be used to challenge other rules tied to the endangerment finding. The agency cited recent Supreme Court decisions as part of its legal rationale for reconsideration, while critics contend scientific evidence of harm is stronger now than in 2009 and that the legal basis for the repeal is weak.

Policy consequences will be immediate and contested. States and cities that have relied on federal standards may move to adopt or preserve their own rules, and advocacy groups and state attorneys general have already signaled litigation is likely. Key next steps for public scrutiny include the final rule text and Federal Register citation that will specify the legal reasoning and effective dates, the administration’s economic analysis behind the $1.3 trillion claim, and any immediate court filings that will determine whether the revocation survives judicial review.