
Trump Administration Repeals Clean Air Act Climate Findings, Opens GHG Rollback
Key Takeaways
- Trump repeals 2009 Endangerment Finding, removing basis for CO2 regulation.
- Rollback reverses Endangerment Finding, undermining U.S. climate action.
- Legal challenges anticipated; environmental groups and scientists vow court fight.
EPA Repeals 2009 Endangerment Finding
The Trump administration formally repealed the 2009 EPA Endangerment Finding.
“It's a huge environmental backslide for the United States”
Trump declared it will be the biggest deregulation move in American history.

The repeal immediately ends vehicle emission standards.
Legal Foundation for Dozens of Regulations
The 2009 Endangerment Finding served as the legal basis for climate regulations.
Its repeal allows the Trump administration to overturn emission limits on vehicles and power plants.

More than 1,000 scientists warned that the repeal would be a major blow to science-based policy.
Environmental Groups Pledge Legal Challenge
NRDC announced it will sue to block the repeal.
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Trump’s move drew immediate condemnation from environmental organizations.
More than 1,000 scientists signed a letter denouncing the decision.
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