🚗EPA Extends Comment Period on Greenhouse Gas Vehicle Standards
On August 1, 2025, the Environmental Protection Agency (EPA) published a proposed rule titled "Reconsideration of 2009 Endangerment Finding and Greenhouse Gas Vehicle Standards." EPA is extending the comment period for this proposed rule.
Learn More🚗EPA Proposes Repeal of Greenhouse Gas Emission Standards
In this action, the U.S. Environmental Protection Agency (EPA) is proposing to repeal all greenhouse gas (GHG) emission standards for light-duty, medium-duty, and heavy-duty vehicles and engines to effectuate the best reading of Clean Air Act (CAA) section 202(a). We propose that CAA section 202(a) does not authorize the EPA to prescribe emission standards to address global climate change concerns and, on that basis, propose to rescind the Administrator's prior findings in 2009 that GHG emissions from new motor vehicles and engines contribute to air pollution which may endanger public health or welfare. We further propose, in the alternative, to rescind the Administrator's prior findings in 2009 because the EPA unreasonably analyzed the scientific record and because developments cast significant doubt on the reliability of the findings. Lastly, we propose to repeal all GHG emission standards on the alternative bases that no requisite technology for vehicle and engine emission control can address the global climate change concerns identified in the findings without risking greater harms to public health and welfare.
Learn More🌍Correction of Greenhouse Gas Regulation Impacts Transportation Agencies
The FHWA is correcting a clerical error in a final rule that appeared in the Federal Register (FR) on April 18, 2025. The final rule repealed a requirement that State departments of transportation (State DOT) and metropolitan planning organizations (MPO) establish declining carbon dioxide (CO<INF>2</INF>) targets for the greenhouse gas (GHG) measure and report on progress toward the achievement of the target.
Learn More🚦Repeal of Greenhouse Gas Target Requirements for Transportation Agencies
This final rule repeals a requirement that State departments of transportation (State DOT) and metropolitan planning organizations (MPO) establish declining carbon dioxide (CO<INF>2</INF>) targets for the greenhouse gas (GHG) measure and report on progress toward the achievement of the target.
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