Final Rule: Rescission of the Greenhouse Gas Endangerment Finding and Motor Vehicle Greenhouse Gas Emission Standards Under the Clean Air Act
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Rule Summary
On February 12, 2026, U.S. Environmental Protection Agency finalized its rescission of the 2009 Greenhouse Gas Endangerment Finding, which served as a prerequisite for regulating emissions from new motor vehicles and new motor vehicle engines. Absent this finding, EPA lacks statutory authority under Section 202(a) of the Clean Air Act to prescribe standards for GHG emissions. Therefore, EPA also finalized the repeal of all subsequent GHG emission standards from its regulations for light-, medium-, and heavy-duty on-highway vehicles and engines. This is the single largest deregulatory action in U.S. history and will save Americans over $1.3 trillion.
As a result of these changes, engine and vehicle manufacturers no longer have any future obligations for the measurement, control, and reporting of GHG emissions for any highway engine and vehicle, including model years manufactured prior to this final rule. This final action is only related to GHG emissions and does not affect regulations on any traditional air pollutants. Rather, this action realigns EPA’s regulatory framework with the best reading of the CAA, which does not authorize EPA to regulate GHG emissions from new motor vehicles.
Documents
- Final Rule: Rescission of the Greenhouse Gas Endangerment Finding and Motor Vehicle Greenhouse Gas Emission Standards Under the Clean Air Act (pdf)
- Fact Sheet: EPA Delivers Single Largest Deregulatory Action in U.S. History, Major Cost Savings for Americans (pdf)
- Timeline of How We Got Here (pdf)
- Fact Sheet: Legal (pdf)
- Fact Sheet: Economic Impact (pdf)
- Fact Sheet: Regulations Affected (pdf)
- Response to Comments (pdf)
- Regulatory Impact Analysis (pdf)
- Redline Version of EPA’s Final Regulations (pdf)
Additional Resources
For more information on previous standards that are proposed to be superseded by this action, visit:
- Endangerment and Cause or Contribute Findings for Greenhouse Gases Under Section 202(a) of the Clean Air Act
- Regulations for Greenhouse Gas Emissions from Passenger Cars and Trucks
- Regulations for Greenhouse Gas Emissions from Commercial Trucks & Buses
- Proposed Rule: Reconsideration of 2009 Endangerment Finding and Greenhouse Gas Vehicle Standards