A district court vacated and remanded the National Marine Fisheries Service's (NMFS') decision denying environmental and animal rights groups' petitions to list the porbeagle shark as endangered or threatened under the ESA. When NMFS receives a petition to list a species, it must make an initial fin...

The Ninth Circuit dismissed an environmental group's ESA and NEPA claims against FWS, the National Park Service (NPS), and the state of Montana in a case concerning the "helicopter hazing" of bison in Yellowstone National Park. To minimize disease transfer between wild bison and cattle in the Greate...

A district court held that the federal government may not regulate the take of the Utah prairie dog, a threatened species, on nonfederal lands under the ESA. In 2012, FWS issued a rule authorizing the take of the Utah prairie dog, via permit, on "agricultural lands, [private property] within [.5 mil...

The Ninth Circuit held that DOT did not violate the CAA or NEPA in its approval of a planned expressway connecting the Ports of Los Angeles and Long Beach, California. In the course of the project’s approval process, DOT conducted an air quality conformity determination under the CAA, which involv...

The D.C. Circuit dismissed automobile industry groups' petition challenging an EPA rule intended to mitigate the misfueling of vehicles and engines with gasoline containing greater than 10% ethanol (E10). Among other measures, the rule prohibits the use of E10 gasoline in certain vehicles, engines, ...

The Tenth Circuit denied petitions for review challenging EPA's approval of a regional cap-and-trade program regulating sulfur dioxide (SO2) emissions to address regional haze over the Colorado Plateau, a Class I area. Under the CAA's regional haze rule for Class I areas, states have the option of u...