Overview

• EPA Administrator Lee Zeldin has proposed rescinding the 2009 Endangerment Finding, which classified greenhouse gases as air pollutants under the Clean Air Act.
• The rollback triggers a mandatory 45-day public comment period before any final decision can be issued.
• Described by the EPA as the largest deregulation measure in U.S. history, the repeal would strip emissions limits from vehicle and power plant regulations.
• Environmental groups and legal analysts plan to challenge the repeal, with litigation likely to reach the conservative-majority Supreme Court.
• Since returning to the White House, President Trump has withdrawn the United States from the Paris Agreement and accelerated oil and gas development, including in Alaska.