In this 82-page opinion, the D.C. Circuit has largely upheld the Environmental Protection Agency's greenhouse gas rules issued after the Supreme Court's decision in Massachusetts v. EPA demanded regulatory action on greenhouse gases. (The court dismissed part of the challenge on the ground that the challengers lacked standing.)
The per curiam opinion came from a panel comprised of Judges Sentelle, Rogers,
and Tatel. To give you an idea of the breadth of the interests at stake: The first 14-plus pages of the opinion is a list of the lawyers and the various parties, non-profit organizations, trade groups, and others who appeared before the court.
The first couple paragraphs of the opinion summarizes the issues and the results:
Following the Supreme Court’s decision in Massachusetts v. EPA, 549 U.S. 497 (2007)—which clarified that greenhouse gases are an “air pollutant” subject to regulation under the Clean Air Act (CAA)—the Environmental Protection Agency promulgated a series of greenhouse gas-related rules. First, EPA issued an Endangerment Finding, in which it determined that greenhouse gases may “reasonably be anticipated to endanger public health or welfare.” See 42 U.S.C. § 7521(a)(1). Next, it issued the Tailpipe Rule, which set emission standards for cars and light trucks. Finally, EPA determined that the CAA requires major stationary sources of greenhouse gases to obtain construction and operating permits. But because immediate regulation of all such sources would result in overwhelming permitting burdens on permitting authorities and sources, EPA issued the Timing and Tailoring Rules, in which it determined that only the largest stationary sources would initially be subject to permitting requirements.
Petitioners, various states and industry groups, challenge all these rules, arguing that they are based on improper constructions of the CAA and are otherwise arbitrary and capricious. But for the reasons set forth below, we conclude: 1) the Endangerment Finding and Tailpipe Rule are neither arbitrary nor capricious; 2) EPA’s interpretation of the governing CAA provisions is unambiguously correct; and 3) no petitioner has standing to challenge the Timing and Tailoring Rules. We thus dismiss for lack of jurisdiction all petitions for review of the Timing and Tailoring Rules, and deny the remainder of the petitions.