Massachusetts v. EPA
Citation: 549 U.S. 497 (U.S. Supreme Court, 2007)
Facts
A group of states, cities, and environmental organizations petitioned the EPA to regulate greenhouse gas emissions from new motor vehicles under the Clean Air Act. The EPA denied the petition, concluding it lacked authority to regulate greenhouse gases and that even if it did, it was inadvisable to do so. Massachusetts and other petitioners challenged the denial, arguing greenhouse gases are “air pollutants” under the Clean Air Act and that EPA was obligated to regulate them.
Issue
Do states have Article III standing to challenge EPA’s refusal to regulate greenhouse gas emissions, and does the Clean Air Act authorize EPA to regulate such emissions from motor vehicles?
Holding
The Supreme Court, 5-4, held that Massachusetts had standing and that greenhouse gases qualify as “air pollutants” under the Clean Air Act. The Court held EPA’s denial of the petition was arbitrary and capricious because EPA failed to provide a reasoned explanation for why it could not make an endangerment finding. The Court remanded for EPA to reconsider.
Rule
States are entitled to “special solicitude” in the standing analysis because they have quasi-sovereign interests in their territory and citizens that differ from those of private litigants. A state’s loss of coastal land to rising seas attributable in part to greenhouse gas emissions constitutes a sufficiently concrete and particularized injury for Article III purposes, even if the injury is gradual and shared by many.
Significance
Massachusetts v. EPA is a landmark environmental and administrative law case with significance on multiple fronts. On standing, it introduces “special solicitude” for states and demonstrates that incremental, widely-shared environmental harms can satisfy the injury-in-fact requirement — a significant departure from Lujan v. Defenders of Wildlife’s stringent approach. On the merits, it established that the Clean Air Act covers greenhouse gases, leading to EPA’s landmark endangerment finding and subsequent climate regulations. The case is also important for the proposition that an agency may not simply refuse to exercise its statutory authority without a reasoned explanation.