21 States Sue to Block EPA Repeal of Power Plant Emissions Limits

Twenty-one states led by New York sued the Trump administration Oct. 1, 2026, asking the D.C. Circuit to strike down EPA's repeal of greenhouse gas limits for coal- and gas-fueled power plants. The states call the repeal arbitrary for ignoring health, climate costs. The ruling could define EPA's duty to regulate power plants, source of one-quarter of U.S. carbon dioxide.