The U.S. Court of Appeals for the District of Columbia Circuit denies petitioners' challenge to a U.S. Environmental Protection Agency (EPA) rule requiring drastic reductions in exhaust emissions from diesel trucks and buses beginning in 2007 and requiring the maximum sulfur content of diesel fuel t...

The court vacates the U.S. Environmental Protection Agency's (EPA's) approval of the revised ozone state implementation plans (SIPs) for the Washington, D.C., Metropolitan Area (Washington Metropolitan Area), made up of the District of Columbia, portions of Maryland, and portions of Virginia. The di...

The court affirms a district court dismissal of a commercial fisherman association's challenge to a fishery management plan (FMP) regulation, known as Framework 25, that instituted year-round closure of a fishing area and required rolling closures of inshore ports along the Gulf of Maine. The New En...

The court holds that the U.S. Supreme Court's decision in Buckhannon Board & Care Home, Inc. v. West Virginia Department of Health & Human Resources, 532 U.S. 598 (2001), did not prohibit the use of the catalyst test as a basis for awarding attorney fees and costs under the Endangered Specie...

The court holds that the Secretary of the Pennsylvania Department of Transportation and the Secretary of the Pennsylvania Department of Environmental Protection violated the Clean Air Act (CAA) by failing to implement state implementation plan (SIP)-required emission standards for the state's enhanc...

The court grants an environmental group's motion for partial summary judgment against Pennsylvania officials for failing to implement the state-enhanced vehicle inspection and maintenance (I/M) program in 16 counties by November 15, 1999, as required by the Pennsylvania state implementation plan (SI...

The court holds that the Secretary of Commerce's adoption of a fishery conservation amendment to the Northeast Multispecies Fishery Management Plan does not violate the Magnuson Act or the Regulatory Flexibility Act (RFA). The amendment sets annual allowable catch targets for regulated species, orch...

The court holds that the U.S. Forest Service policy of leaving game "baiting" regulation in the National Forest System to the states complies with the National Environmental Policy Act (NEPA) and the Endangered Species Act (ESA). The court first holds that the adoption of the new policy is not a maj...

The court holds that the U.S. Fish and Wildlife Service (FWS) did not violate Endangered Species Act (ESA) §4(b)(3)(A) when it relied on its 1997 listing priority guidance and failed to make a preliminary 90-day finding on a petition to list the Columbian sharp-tail grouse as endangered. In respons...

The court upholds the U.S. Environmental Protection Agency's (EPA's) redesignation of five parcels of tribal land as a nonfederal Class I area under the Clean Air Act (CAA) prevention of significant deterioration (PSD) program. The court first holds that Arizona's chamber of commerce lacks standing ...