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Massachusetts v. EPA
Massachusetts v. EPA ↗
03-1361D.C. Cir.2 entries
Filing Date
Type
Action Taken
Document
Summary
04/02/2008
Petition
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.”
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Massachusetts v. EPA ↗
05-1120U.S.2 entries
Filing Date
Type
Action Taken
Document
Summary
04/02/2007
Decision
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.