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Supreme Court Docket

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Massachusetts, et al. v. Environmental Protection Agency
No. 05-1120
    Massachusetts, et al. v. Environmental Protection Agency, et al.


    Clean Air Act, Air Pollutants, Motor Vehicle Emissions, Emission Standards, Administrative Law, Public Health & Welfare
    Section 202(a)(1) of the Clean Air Act, 42 U.S.C. section 7521(a)(1), requires the administrator of the Environmental Protection Agency ("EPA ") to set emission standards for "any air pollutant" from motor vehicles or motor vehicle engines "which in his judgment cause[s], or contribute[s] to, air pollution which may reasonably be anticipated to endanger public health or welfare."

    The questions presented are:

    1. Whether the EPA Administrator may decline to issue emission standards for motor vehicles based on policy considerations not enumerated in section 202(a)(1).
    2. Whether the EPA Administrator has authority to regulate carbon dioxide and other air pollutants associated with climate change under section 202(a)(1).



  • Docket Sheet From the U.S. Supreme Court.
  • Northwestern University - Medill School of Journalism: On the Docket

    Parties Counsel of Record

For Petitioners Massachusetts, et al.:

James R. Milkey
Boston, MA
For Respondents Michigan, et al.:
Thomas L. Casey
Solicitor General
Office of the Attorney General
Lansing, MI


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