{"argument_date":"2014-02-24T00:00:00Z","arguments":[{"argument_date":"2014-02-24T00:00:00Z","heading":"What happened at the argument","official_detail_url":"https://www.supremecourt.gov/oral_arguments/argument_transcript/2013","official_transcript_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","paragraphs":["Keisler argued the situation is unprecedented.","Verrilli argued EPA is managing a transition.","Mitchell noted both sides agree on two issues."],"reargument":false,"sequence":1,"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 10, lines 25-29","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 10, lines 25-29"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 10, lines 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23-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 58, lines 23-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 59, lines 11-19","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 59, lines 11-19"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 59, lines 35-39","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 59, lines 35-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 17-7","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 6, lines 17-7"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 60, lines 7-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 60, lines 7-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 61, lines 21-25","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 61, lines 21-25"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 61, lines 39-43","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 61, lines 39-43"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 35-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 7, lines 35-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 49-11","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 7, lines 49-11"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 71, lines 41-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 71, lines 41-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 8, lines 25-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 8, lines 25-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 88, lines 27-23","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 88, lines 27-23"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 9, lines 3-19","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 9, lines 3-19"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 9, lines 51-11","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 9, lines 51-11"}]}],"caption":"Utility Air Regulatory Group v. EPA","case_history":[{"changed_at":"2026-08-29T20:06:23.965047Z","explanation":"An official oral-argument transcript was verified.","status":"argued"},{"changed_at":"2026-08-29T20:06:23.967954Z","explanation":"An official oral-argument transcript was verified.","status":"argued"}],"case_status":"argued","dek":"the sides that brought the case argue the statute does not cover greenhouse gases. EPA argues the law requires regulation.","dek_sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 33, lines 19-13","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 33, lines 19-13"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 45, lines 51-31","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 45, lines 51-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 21-15","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 5, lines 21-15"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 55, lines 25-5","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 55, lines 25-5"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 88, lines 27-23","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 88, lines 27-23"}],"dispositions":[],"latest_court_document_date":"2014-02-24T00:00:00Z","maturity":"official_transcript","official_detail_url":"https://www.supremecourt.gov/oral_arguments/argument_transcript/2013","official_disposition_urls":[],"official_docket_url":"https://www.supremecourt.gov/docket/docketfiles/html/public/12-1146.html","primary_docket":"12-1146","revisions":[{"correction_note":"Rewritten to the concise citizen-facing editorial standard.","created_at":"2026-08-30T20:55:24.848333Z","maturity":"official_transcript","revision_number":1},{"correction_note":"Migrated to the dated official Court activity contract without model use.","created_at":"2026-09-05T03:22:24Z","maturity":"official_transcript","revision_number":2}],"schema_version":"1.1","sections":[{"heading":"What this case is about","paragraphs":["The case tests whether the Clean Air Act mandates greenhouse gas regulation."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 33, lines 19-13","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 33, lines 19-13"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 45, lines 51-31","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 45, lines 51-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 21-15","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 5, lines 21-15"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 55, lines 25-5","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 55, lines 25-5"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 88, lines 27-23","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 88, lines 27-23"}]},{"heading":"How the case got here","paragraphs":["The Supreme Court heard oral argument in this case on February 24, 2014."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 7-19","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 5, lines 7-19"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 71, lines 41-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 71, lines 41-41"}]},{"heading":"What each side wants","paragraphs":["the sides that brought the case want the Court to reject EPA's greenhouse gas rules.","EPA wants the Court to uphold its regulatory authority."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 33, lines 19-13","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 33, lines 19-13"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 45, lines 51-31","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 45, lines 51-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 21-15","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 5, lines 21-15"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 55, lines 25-5","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 55, lines 25-5"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 88, lines 27-23","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 88, lines 27-23"}]},{"heading":"What each side says","paragraphs":["the sides that brought the case argue the statute does not cover greenhouse gases.","EPA argues the statute requires regulating these pollutants."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 33, lines 19-13","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 33, lines 19-13"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 45, lines 51-31","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 45, lines 51-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 21-15","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 5, lines 21-15"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 55, lines 25-5","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 55, lines 25-5"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 88, lines 27-23","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 88, lines 27-23"}]},{"heading":"What the justices asked","paragraphs":["Justice Kagan asked how the phrase any air pollutant applies.","Justice Sotomayor asked why the agency should receive deference."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 10, lines 25-29","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 10, lines 25-29"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 10, lines 37-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 10, lines 37-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 11, lines 19-23","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 11, lines 19-23"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 11, lines 41-45","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 11, lines 41-45"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 12, lines 11-29","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 12, lines 11-29"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 12, lines 33-33","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 12, lines 33-33"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 56, lines 21-31","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 56, lines 21-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 56, lines 47-13","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 56, lines 47-13"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 57, lines 17-29","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 57, lines 17-29"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 57, lines 41-45","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 57, lines 41-45"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 57, lines 49-7","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 57, lines 49-7"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 58, lines 11-21","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 58, lines 11-21"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 58, lines 23-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 58, lines 23-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 59, lines 11-19","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 59, lines 11-19"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 59, lines 35-39","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 59, lines 35-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 17-7","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 6, lines 17-7"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 60, lines 7-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 60, lines 7-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 61, lines 21-25","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 61, lines 21-25"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 61, lines 39-43","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 61, lines 39-43"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 35-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 7, lines 35-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 49-11","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 7, lines 49-11"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 8, lines 25-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 8, lines 25-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 9, lines 3-19","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 9, lines 3-19"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 9, lines 51-11","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 9, lines 51-11"}]},{"heading":"Why it matters","paragraphs":["The outcome determines whether factories must cut emissions. It shapes national climate policy. It affects industrial compliance costs."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 33, lines 19-13","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 33, lines 19-13"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 45, lines 51-31","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 45, lines 51-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 21-15","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 5, lines 21-15"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 55, lines 25-5","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 55, lines 25-5"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 88, lines 27-23","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 88, lines 27-23"}]},{"heading":"What happens next","paragraphs":["This article currently covers the argument record. Use the official docket link for later case activity."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 10, lines 25-29","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 10, lines 25-29"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 10, lines 37-41","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 10, lines 37-41"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 11, lines 19-23","official_url":"https://www.supremecourt.gov/oral_arguments/argument_transcripts/2013/12-1146_8n6a.pdf","page_label":"file page 11, lines 19-23"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 11, lines 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