The court denied a petition to review the U.S. Environmental Protection Agency's (EPA's) approval of a revision to Missouri's state implementation plan (SIP) that replaced four area…

The court holds that trade associations' action for judicial review of a U.S. Environmental Protection Agency (EPA) rule permitting the use of "any credible evidence" to prove or…

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…

The court holds that the Federal Aviation Administration's (FAA's) approval of the expansion of Burbank-Glendale-Pasadena Airport does not violate the National Environmental Policy Act (…

The court denies a petition challenging the U.S. Environmental Protection Agency's (EPA's) decision to grant a nitrogen oxide (NOx) reduction requirement exemption to four states…

The court holds that a U.S. Environmental Protection Agency (EPA) regulation that creates a 12-month grace period exempting transportation projects in nonattainment and maintenance areas from…

The court holds that the Massachusetts Department of Environmental Protection's (DEP's) zero emission vehicle (ZEV) regulations for automobile manufacturers are not identical to…

The court holds that the U.S. Environmental Protection Agency (EPA) did not violate the U.S. Constitution's Tenth Amendment or Spending Clause by imposing Clean Air Act (CAA) offset and…

The court upholds a U.S. Environmental Protection Agency (EPA) rule that allows a state to stop Clean Air Act (CAA) §179(a)'s 18-month countdown to imposition of sanctions when it is…

The court holds that New Mexico's environmental agency may not bring an enforcement action in federal court to seek federalpenalties under §113 of the Clean Air Act (CAA) for violations of…