# U.S. Supreme Court

Type: organization

Source: Climate Intelligence Brief — https://getclimatebrief.com/entity/us-supreme-court-organization
Canonical HTML page: https://getclimatebrief.com/entity/us-supreme-court-organization

## Timeline

- **2026-03-19**: 23-State Lawsuit Filed — States launch legal challenge to prevent the rollback of the Endangerment Finding.
- **2026-03-19**: States File Lawsuit — A coalition of states sues to block the repeal, alleging it violates the Clean Air Act.
- **2026-03-18**: Repeal Announced — The Trump EPA formally moves to repeal the 2009 finding, citing a need for deregulation.
- **2026-02-23**: SCOTUS Intervention — The U.S. Supreme Court officially agrees to take up the appeal from the oil companies.
- **2024-11-05**: Federal Support — The Trump administration files a brief supporting the oil companies' bid for Supreme Court review.
- **2020-06-15**: Lower Court Ruling — A lower court allows the litigation to proceed under state law, rejecting company motions to dismiss.
- **2018-04-17**: Lawsuit Filed — Boulder, Colorado, files suit against ExxonMobil and Suncor Energy over climate change impacts.
- **2009-12-15**: Endangerment Finding Issued — EPA officially determines that GHG emissions threaten public health and welfare.
- **2009-12-15**: Endangerment Finding Issued — EPA officially determines that six greenhouse gases threaten the health of current and future generations.
- **2007-04-02**: Massachusetts v. EPA — Supreme Court rules that greenhouse gases are pollutants under the Clean Air Act.
- **2007-04-02**: Massachusetts v. EPA — Supreme Court rules EPA has authority to regulate GHGs if they are found to endanger public health.

## Recent coverage (4 stories)

### Trump Blames Canada for Wildfire Smoke, Threatens Tariffs; Carney Cites Climate Change
2026-07-19 14:21:15 · Sentiment: Negative · Impact: 7/10 · Sources: 9

President Trump’s tariff threat over Canadian wildfire smoke highlights a stark divide: the U.S. blames forest management, while Canadian PM Carney says climate change is the real culprit. As hazardous smoke blankets U.S. cities, the dispute raises questions about how governments should address the mounting costs of climate-driven disasters.
Full story: https://getclimatebrief.com/story/trump-canada-wildfire-smoke-climate-tariffs

### US States Sue Trump EPA to Protect Bedrock Climate Endangerment Finding
2026-03-19 21:16:05 · Sentiment: Negative · Impact: 8/10 · Sources: 2

A coalition of U.S. states has filed a major lawsuit against the Environmental Protection Agency (EPA) following its decision to repeal the 2009 Endangerment Finding. The legal challenge seeks to preserve the scientific determination that greenhouse gases threaten public health, which serves as the mandatory legal trigger for federal climate regulations.
Full story: https://getclimatebrief.com/story/us-states-sue-epa-climate-endangerment-finding

### 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

### SCOTUS Agrees to Hear Landmark Oil Industry Bid to Dismiss Climate Lawsuits
2026-02-24 07:38:32 · Sentiment: Neutral · Impact: 8/10 · Sources: 2

The U.S. Supreme Court has granted a petition by ExxonMobil and Suncor Energy to review a lower court ruling that allowed climate-related lawsuits from Colorado local governments to proceed. This decision marks a critical turning point for dozens of similar cases nationwide seeking to hold fossil fuel companies financially liable for climate change impacts.
Full story: https://getclimatebrief.com/story/scotus-oil-climate-lawsuit-appeal

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This page is a machine-readable summary. Sentiment measures the directional read of each development for this entity, not the tone of the reporting; impact weights consequence, not syndication reach. See https://getclimatebrief.com/guides/methodology for the full editorial methodology.