Environmental Regulation

President Trump and EPA Administrator Lee Zeldin have formally revoked the 2009 greenhouse‑gas "endangerment finding"—the scientific and legal foundation for federal climate rules including vehicle CO2 standards—saying the Clean Air Act does not authorize such regulation and touting the move as a historic deregulatory, cost‑saving action. Scientists, public‑health experts and the National Academies say the original finding remains robust, citing studies that link warming to thousands of U.S. heat‑related deaths, and environmental groups and legal analysts predict immediate lawsuits even as modeling suggests repeal would slow but not stop emissions declines driven largely by market forces.