Overview
- A coalition led by California, Massachusetts, New York and Connecticut filed a D.C. Circuit petition to vacate EPA’s February repeal of the 2009 endangerment finding and restore federal greenhouse-gas authority.
- In total, 24 states joined with 10 cities and five counties, along with the District of Columbia and the U.S. Virgin Islands, following earlier suits by environmental and public‑health groups.
- EPA defends the repeal by arguing the Clean Air Act does not authorize greenhouse‑gas standards for cars and trucks, citing a reevaluation informed by recent Supreme Court decisions such as West Virginia v. EPA and Loper Bright.
- The repeal scrapped all federal greenhouse‑gas standards for cars and trucks and could pave the way for broader rollbacks on power plants and oil and gas facilities, according to court filings and reporting.
- Legal observers expect consolidated, multi‑year litigation that could reach the Supreme Court; Republican‑led states have moved to back EPA, while plaintiffs point to Massachusetts v. EPA and prior rulings upholding the 2009 finding.