# Coalition of 23 States

Type: organization

Source: Climate Intelligence Brief — https://getclimatebrief.com/entity/coalition-of-23-states
Canonical HTML page: https://getclimatebrief.com/entity/coalition-of-23-states

## Timeline

- **2026-03-19**: 23-State Lawsuit Filed — States launch legal challenge to prevent the rollback of the Endangerment Finding.
- **2009-12-15**: Endangerment Finding Issued — EPA officially determines that GHG emissions threaten public health and welfare.
- **2007-04-02**: Massachusetts v. EPA — Supreme Court rules that greenhouse gases are pollutants under the Clean Air Act.

## Recent coverage (1 stories)

### 23 States Sue Trump EPA to Protect Landmark Climate Endangerment Finding
2026-03-19 20:52:10 · Sentiment: Negative · Impact: 7/10 · Sources: 2

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.
Full story: https://getclimatebrief.com/story/states-lawsuit-trump-epa-endangerment-finding

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