EPA formally repeals endangerment finding, eliminating legal basis for all greenhouse gas regulation (February 12, 2026 )
February 12, 2026 — President Trump and EPA Administrator Zeldin jointly announced the formal repeal of the 2009 Greenhouse Gas Endangerment Finding — the scientific determination that carbon dioxide, methane, and other greenhouse gases endanger public health and welfare, and the legal foundation for every major U.S. climate regulation enacted under the Clean Air Act. Press Secretary Karoline Leavitt called it the "largest deregulatory action in American history," claiming it would save Americans $1.3 trillion and more than $2,400 per vehicle purchased. Zeldin wrote on X: "This week, we make history."
The repeal immediately toppled the legal basis for rules governing emissions from power plants, cars and light trucks, heavy-duty vehicles, and the oil and gas industry — sectors that together account for the vast majority of U.S. greenhouse gas output. Legal scholars at Harvard, Columbia, and elsewhere warned that the repeal rested on a legal theory — that the Clean Air Act does not authorize regulation of greenhouse gases at all — that contradicts the Supreme Court's 2007 ruling in Massachusetts v. EPA and would face years of litigation. The World Resources Institute noted that the U.S. is one of the world's largest greenhouse gas emitters and that making regulation "much harder" would have global consequences.
Environmental and public health groups filed legal challenges immediately. Industry groups were divided: fossil fuel companies celebrated while automakers, utilities, and manufacturers who had invested billions in compliance with the now-revoked rules faced regulatory whiplash and uncertainty about the legal status of their existing environmental commitments. Independent legal analysts predicted the repeal would be litigated all the way to the Supreme Court before its ultimate fate was determined.
| https://www.wri.org/insights/endangerment-finding-repeal-explained |