Description: Challenge to decision by EPA not to regulate GHGs from mobile sources under the Clean Air Act.
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Massachusetts v. EPA
Case Documents:
Filing Date Type File Action Taken Summary 04/02/2007 Opinion Download Standing granted; EPA required to decide whether to regulate greenhouse gases under the Clean Air Act. 547 U.S. 497 (2007). The Supreme Court found that Massachusetts had satisfied the requirements for standing. The Supreme Court further concluded that greenhouse gases are air pollutants under the Clean Air Act, and that EPA must determine under Section 202(a) of the Clean Air Act whether greenhouse gas emissions from new motor vehicles cause or contribute to air pollution that would endanger public health or welfare. 08/31/2006 Brief Download Brief filed by petitioners. -
Massachusetts v. EPA
Case Documents:
Filing Date Type File Action Taken Summary 06/26/2008 Order Download Petition for writ of mandamus denied after Supreme Court's decision. 04/02/2008 Petition Download Petition for writ of mandamus filed to compel EPA to issue its determination on whether the air pollution to which greenhouse gas emissions from motor vehicles contribute “may reasonably be anticipated to endanger public health or welfare.”