The D.C. Circuit denied petitions to review EPA's promulgation of a rule that regulates the emission of greenhouse gases from aircraft engines under CAA §231 by aligning domestic standards with those recently promulgated by the International Civil Aviation Organization (ICAO). Twelve states, the Di...

The D.C. Circuit granted in part and denied in part petitions to review EPA's revisions to designations promulgated in 2018 for northern Weld County, Colorado, and El Paso, Texas, as areas that had attained 2015 ozone pollution standards. The revised designations folded Weld County into the greater ...

The D.C. Circuit reversed summary judgment for NMFS in a Maine lobstermen group's challenge to the Service's 2021 biological opinion (BiOp) that authorized a series of federal fisheries, including the lobster fishery, and implemented a conservation framework designed to reduce the fisheries' impact ...

The D.C. Circuit, in a split ruling, vacated certain provisions of EPA's rule phasing out the use of hydrofluorocarbons (HFCs). Two companies and three trade groups argued EPA exceeded its authority in issuing the rule and that the American Innovation and Manufacturing (AIM) Act, which directed the ...

A district court granted a group of youths' motion for leave to file a second amended complaint in a lawsuit alleging the U.S. government failed to act on climate change and violated their right to a safe climate. The youths had argued that the government violated their constitutional rights under t...

The Tenth Circuit affirmed in part and reversed in part dismissal of a challenge to the Forest Service's approval of grazing permits in Bridger-Teton National Forest that authorized the "lethal take" of grizzly bears. Environmental groups challenged the approval, arguing FWS violated the ESA because...

The D.C. Circuit dismissed industry groups' petitions to review EPA's decision not to reconsider its 2009 finding that greenhouse gas (GHG) emissions from motor vehicles contribute to climate change and thus endanger public health and welfare. The groups initially petitioned EPA to reconsider its fi...

A district court denied summary judgment for a group of landowners in a challenge to the Bureau of Ocean Energy Management's (BOEM's) and NMFS' decisions approving an offshore wind energy project off the coast of Nantucket. The group argued that NMFS violated the ESA by failing to adequately conside...