Appellate Court Backs EPA Aircraft GHG Rule Over State, Citizen Challenges

The U.S. Court of Appeals for the District of Columbia Circuit has upheld EPA’s rule regulating greenhouse gases from aircraft emissions, a measure that aligned the agency’s rules with international standards but which state and environmental challengers charged was a “do-nothing” rule that unlawfully fails to cut emissions from a business-as-usual scenario. The unanimous June 29 ruling in California v. EPA likely dooms similar suits that states and environmentalists have brought over EPA’s rules addressing particulate matter (PM) emissions...