The court denies an environmental group's petition to review the U.S. Environmental Protection Agency's (EPA's) approval of Maryland's revised motor vehicle emissions budget (…

The court vacates the Environmental Protection Agency's (EPA's) approval of a county's Clean Air Act (CAA) new source review (NSR) program because EPA did not adequately assess…

The court denies most of oil companies' motions to dismiss in a class action suit brought by individual well owners claiming that the companies knowingly caused methyl tertiary butyl ether (…

The court remands the U.S. Environmental Protection Agency's (EPA's) hazardous air pollutant emission standards for hazardous waste combustors to the Agency because the standards fail to…

The court denies an engine manufacturer's petition to review the U.S. Environmental Protection Agency's (EPA's) Clean Air Act (CAA) Phase 2 emissions standards for new nonroad spark…

The court remands three portions of technical amendments the U.S. Environmental Protection Agency (EPA) made to its nitrogen oxide (NOx) state implementation plan (SIP) call rulemaking that…

The court denies a petition to review the U.S. Environmental Protection Agency's (EPA's) approval of a revision to Missouri's Clean Air Act (CAA) state implementation plan that…

The court remands two aspects of a final U.S. Environmental Protection Agency (EPA) rule that requires many nitrogen oxide-emitting facilities in several midwestern and southeastern states to…

The court holds that the U.S. Environmental Protection Agency (EPA) has the power under the Clean Air Act (CAA) to adopt de minimis exemptions for sources of pollution from particulate matter…

The court reverses and remands the convictions of two individuals charged with improperly removing asbestos-containing materials from a hotel and casino in Las Vegas, Nevada. The court first holds…