{"abstract":"In this action, the U.S. Environmental Protection Agency (EPA) is proposing to repeal all greenhouse gas (GHG) emissions standards for fossil fuel-fired power plants. The EPA is proposing that the Clean Air Act (CAA) requires it to make a finding that GHG emissions from fossil fuel-fired power plants contribute significantly to dangerous air pollution, as a predicate to regulating GHG emissions from those plants. The EPA is further proposing to make a finding that GHG emissions from fossil fuel-fired power plants do not contribute significantly to dangerous air pollution. The EPA is also proposing, as an alternative, to repeal a narrower set of requirements that includes the emission guidelines for existing fossil fuel-fired steam generating units, the carbon capture and sequestration/storage (CCS)-based standards for coal-fired steam generating units undertaking a large modification, and the CCS-based standards for new base load stationary combustion turbines.","action":"Proposed rule.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2025/06/17/2025-10991.html","cfr_references":[{"chapter":null,"citation_url":null,"part":60,"title":40}],"citation":"90 FR 25752","comment_url":null,"comments_close_on":"2025-08-07","correction_of":null,"corrections":[],"dates":"Comments. Comments must be received on or before August 7, 2025.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2025-0124","FRL-12674-01-OAR"],"dockets":[{"supporting_documents":[{"title":"U.S. EPA. GHG Abatement Measures. Technical Support Document. June 10 2014. Document ID No. EPA-HQ-OAR-2013-0602-36852","document_id":"EPA-HQ-OAR-2025-0124-0079"},{"title":"PV EAV and Net Benefits Analysis - 2025 Proposed Action","document_id":"EPA-HQ-OAR-2025-0124-0071"},{"title":"U.S. EPA. Information Collection Request (ICR) Supporting Statement. Proposed Repeal: Emission Guidelines for Greenhouse Gas Emissions for Electric Utility Generating Units. Subpart UUUUb. May 2025","document_id":"EPA-HQ-OAR-2025-0124-0067"},{"title":"Estimating PM2.5- and Ozone-attributable Health Benefits TSD","document_id":"EPA-HQ-OAR-2025-0124-0059"},{"title":"US EPA. Final Regulatory Flexibility Analysis. 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