Overview
- Announced at the White House with EPA chief Lee Zeldin, the repeal is touted by the administration as the largest deregulation and a way to lower new-vehicle costs.
- The move immediately terminates federal greenhouse-gas limits for cars and trucks and clears a path to unwind other rules, including those for power plants.
- Environmental groups and scientists say they will sue, with a protracted legal fight expected that could reach the U.S. Supreme Court, which previously recognized EPA authority on greenhouse gases in 2007.
- More than 1,000 scientists have condemned the reversal as contrary to evidence, noting that research on human-driven warming has only strengthened as 2025 ranked among the hottest years on record.
- Barack Obama and Democratic governors including Gavin Newsom and Tony Evers criticized the decision and pledged challenges, while the administration argues greenhouse gases are not traditional local pollutants and downplays human impact on climate.