Coalition of 23 States

organization

Last mentioned: Mar 19, 2026

Timeline

Mar 19, 2026
23-State Lawsuit Filed

States launch legal challenge to prevent the rollback of the Endangerment Finding.
Dec 15, 2009
Endangerment Finding Issued

EPA officially determines that GHG emissions threaten public health and welfare.
Apr 2, 2007
Massachusetts v. EPA

Supreme Court rules that greenhouse gases are pollutants under the Clean Air Act.

Stories mentioning Coalition of 23 States 1

23 States Sue Trump EPA to Protect Landmark Climate Endangerment Finding

A coalition of 23 states has filed a high-stakes lawsuit against the Environmental Protection Agency to block efforts to weaken the 2009 Endangerment Finding. This legal challenge seeks to preserve the scientific and legal foundation that mandates federal regulation of greenhouse gas emissions.

Mar 19, 2026 2 sources