Overview

• EPA has proposed rescinding its 2009 Endangerment Finding, which classifies greenhouse gases as threats to public health and underpins federal CO₂ limits on vehicles and power plants.
• Administrator Lee Zeldin describes the move as the "largest deregulation measure in U.S. history" and claims the finding imposed undue economic burdens.
• The proposal directly challenges the Supreme Court’s 2007 decision that directed the EPA to regulate greenhouse gases under the Clean Air Act.
• The agency has launched a 45-day public comment period, and states alongside environmental groups have vowed legal challenges to block the repeal.
• Critics warn that stripping the Endangerment Finding would dismantle the federal authority to curb emissions and marks a broad shift toward expanding fossil fuel use.