{"argument_date":"2006-11-29T00:00:00Z","arguments":[{"argument_date":"2006-11-29T00:00:00Z","heading":"What happened at the argument","official_detail_url":"https://www.supremecourt.gov/oral_arguments/argument_transcript/2006","official_transcript_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","paragraphs":["Justice Scalia questioned the link between car emissions and state injury.","Justice Kennedy asked if proving global warming is necessary for standing.","The EPA argued Congress did not authorize greenhouse gas regulation."],"reargument":false,"sequence":1,"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 25, lines 15-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 25, lines 15-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 3, lines 17-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 3, lines 17-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 3, lines 7-15","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 3, lines 7-15"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 4, lines 41-47","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 4, lines 41-47"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 27-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 5, lines 27-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 45-45","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 5, lines 45-45"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 7-9","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 5, lines 7-9"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 23-33","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 6, lines 23-33"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 41-49","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 6, lines 41-49"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 7-15","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 6, lines 7-15"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 13-21","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 7, lines 13-21"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 25-31","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 7, lines 25-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 45-11","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 7, lines 45-11"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 8, lines 23-31","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 8, lines 23-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 8, lines 47-11","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 8, lines 47-11"}]}],"caption":"Massachusetts v. EPA","case_history":[{"changed_at":"2026-08-29T20:06:28.147426Z","explanation":"An official oral-argument transcript was verified.","status":"argued"}],"case_status":"argued","dek":"Massachusetts and other states ask the Court to compel the EPA to set limits on vehicle greenhouse gases. The EPA argues Congress did not grant it that power.","dek_sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 25, lines 15-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 25, lines 15-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 3, lines 17-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 3, lines 17-39"}],"dispositions":[],"latest_court_document_date":"2006-11-29T00:00:00Z","maturity":"official_transcript","official_detail_url":"https://www.supremecourt.gov/oral_arguments/argument_transcript/2006","official_disposition_urls":[],"official_docket_url":"https://www.supremecourt.gov/docket/docketfiles/html/public/05-1120.html","primary_docket":"05-1120","revisions":[{"correction_note":"Rewritten to the concise citizen-facing editorial standard.","created_at":"2026-08-31T21:50:18.233140Z","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":["This case tests whether the EPA must regulate carbon dioxide from cars. The states claim this pollution harms them. The agency says its law does not cover this issue."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 25, lines 15-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 25, lines 15-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 3, lines 17-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 3, lines 17-39"}]},{"heading":"How the case got here","paragraphs":["The Supreme Court heard oral argument in this case on November 29, 2006."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 3, lines 7-15","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 3, lines 7-15"}]},{"heading":"What each side wants","paragraphs":["Massachusetts wants the Court to order the EPA to set car emission limits.","The EPA wants the Court to dismiss the case for lack of standing."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 25, lines 15-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 25, lines 15-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 3, lines 17-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 3, lines 17-39"}]},{"heading":"What each side says","paragraphs":["Massachusetts argues the EPA has the legal duty to regulate vehicle emissions.","The EPA argues Congress did not grant it authority to regulate greenhouse gases."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 25, lines 15-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 25, lines 15-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 3, lines 17-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 3, lines 17-39"}]},{"heading":"What the justices asked","paragraphs":["Justice Scalia asked if only new cars would be affected by new rules.","Justice Kennedy asked if the Court must decide global warming to find injury."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 4, lines 41-47","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 4, lines 41-47"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 27-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 5, lines 27-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 45-45","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 5, lines 45-45"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 7-9","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 5, lines 7-9"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 23-33","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 6, lines 23-33"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 41-49","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 6, lines 41-49"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 7-15","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 6, lines 7-15"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 13-21","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 7, lines 13-21"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 25-31","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 7, lines 25-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 45-11","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 7, lines 45-11"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 8, lines 23-31","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 8, lines 23-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 8, lines 47-11","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 8, lines 47-11"}]},{"heading":"Why it matters","paragraphs":["This dispute determines if the EPA controls vehicle pollution. It shapes federal environmental regulation power. It affects state climate protection efforts."],"sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 25, lines 15-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 25, lines 15-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 3, lines 17-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 3, lines 17-39"}]},{"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 3, lines 7-15","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 3, lines 7-15"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 4, lines 41-47","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 4, lines 41-47"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 27-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 5, lines 27-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 45-45","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 5, lines 45-45"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 5, lines 7-9","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 5, lines 7-9"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 23-33","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 6, lines 23-33"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 41-49","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 6, lines 41-49"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 6, lines 7-15","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 6, lines 7-15"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 13-21","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 7, lines 13-21"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 25-31","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 7, lines 25-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 7, lines 45-11","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 7, lines 45-11"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 8, lines 23-31","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 8, lines 23-31"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 8, lines 47-11","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 8, lines 47-11"}]}],"slug":"2006-05-1120-massachusetts-v-epa","term":"2006","title":"Can states force the EPA to regulate car emissions?","title_sources":[{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 25, lines 15-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 25, lines 15-39"},{"evidence_type":"Transcript","label":"Official Supreme Court Transcript — file page 3, lines 17-39","official_url":"https://www.supremecourt.gov/pdfs/transcripts/2006/05-1120.pdf","page_label":"file page 3, lines 17-39"}],"topics":[],"undated_disposition_date_fallback":null,"updated_at":"2026-09-05T03:22:24Z"}