In a per curiam opinion, the D.C. Circuit dismissed in part and denied in part challenges to EPA's 2022 denial of pending Renewable Fuel Standard (RFS) exemption petitions filed by small refineries. EPA had determined the only costs relevant to showing economic hardship were those caused by complian...

The D.C. Circuit denied a chemical manufacturer's and two trade groups' petitions to review EPA's 2020 rule regulating emissions from miscellaneous organic chemical manufacturing facilities. The petitioners challenged EPA's assessment of cancer risk from exposure to ethylene oxide emissions. The cou...

A district court granted in part and denied in part summary judgment for environmental groups in a challenge to FWS' 2020 revised 12-month finding on a petition to list the Upper Missouri River distinct population segment of arctic grayling. The groups argued FWS failed to analyze the adequacy of ex...

The D.C. Circuit denied a petition to review EPA's 2023 regulations that imposed new reporting requirements on biogas producers. An industry group argued, among other things, that EPA had no authority to regulate biogas producers and that three categories in the regulations—those related to biogas...

In a per curiam order, the D.C. Circuit denied states' and industry groups' motions to stay EPA's rule aimed at reducing pollution from fossil fuel power plants. Petitioners argued EPA acted arbitrarily and capriciously in determining that carbon capture and other emission control technologies were ...

A district court adopted in part, modified in part, and rejected in part a magistrate judge's findings and recommendations in a challenge to FWS' biological opinion (BiOp) for Flathead National Forest's 2018 revised land management plan. Environmental groups argued FWS and the Forest Service violate...

The Ninth Circuit affirmed a district court's permanent injunction in an ESA citizen suit concerning a proposed timber harvesting project on private property in Oregon. Environmental groups argued the project would cause a "take" of marbled murrelets in violation of the ESA by clearing acres of tree...

In an unpublished per curiam judgment, the D.C. Circuit affirmed summary judgment for NMFS in a challenge to the Service's 2019 rule regarding turtle excluder devices. Environmental groups argued the final rule was not adequately explained, that it was not a logical outgrowth of the proposed rule th...

The U.S. Supreme Court, 5-4, granted three states' and several industry groups' applications to stay enforcement of EPA's 2023 rule issuing a federal implementation plan (FIP) for 23 states whose SIPs the Agency determined had failed to adequately address new air quality standards for ozone levels u...

The Ninth Circuit affirmed a district court ruling in favor of the Bureau of Reclamation and FWS in a challenge to the agencies' renewal of water supply contracts in California. Environmental groups argued that FWS conducted an inadequate consultation on the effects of the renewals on delta smelt an...