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Environmental Defense v. Duke Energy Corp.

Docket No.: 05-848
Certiorari Granted: May 15 2006
Argued: November 1, 2006
Decided: April 2, 2007

Topics:

Clean Air Act, Environmental Protection Agency, EPA, Indians, judicial review, Natural Resources

PartyNames: Environmental Defense, et al. v. Duke Energy Corporation, et al.
Petitioner: Environmental Defense
Respondent: Duke Energy Corp.

Court Below: United States Court of Appeals for the Fourth Circuit

Environmental Defense
v.
Duke Energy Corp.
549 U.S. 561 (2007)
Background:

In this civil enforcement action under the Clean Air Act, the Fourth Circuit ruled that EPA's definition, embodied in a 1980 regulation, of emissions "increases" for purposes of the Prevention of Significant Deterioration (PSD) program violates the Act because it differs from a regulatory definition EPA employs to measure emissions increases under another program under the Act, the New Source Performance Standards (NSPS). Both the court's holding and its analysis of the statute conflict with decisions of other courts, including a decision rendered by the D.C. Circuit rejecting challenges to the very regulations at issue in this case, New York v. EPA, 413 F.3d 3 (D.C. Cir. 2005).

Question Presented:

1. Whether the Fourth Circuit's decision violated Section 307(b) of the Act, which provides that national Clean Air Act regulations are subject to challenge "only" in the D.C. Circuit by petition for review filed within 60 days of their promulgation, and "shall not be subject to judicial review" in enforcement proceedings, 42 U.S.C. 7607(b); and 2. Whether the Act's definition of "modification," which turns on whether there is an "increase" in emissions and which applies to both the NSPS and PSD programs, rendered unlawful EPA's longstanding regulatory test defining PSD "increases" by reference to actual, annual emissions.

Environmental Defense v. Duke Energy Corp.
ORAL ARGUMENT

Nov 1 2006

Environmental Defense v. Duke Energy Corp. Oral Argument Transcript (PDF)
Holding: judgment vacated and remanded
Vote: 9-0
Opinion By:
Read ENVIRONMENTAL DEFENSE V. DUKE ENERGY CORP. opinion (PDF)

Read opinion
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