EPA, California Fight Advocates' Bid For Retroactive Stricter PM2.5 Limits

EPA and California officials are fighting environmentalists' suit aiming to force retroactive application of stricter fine particulate matter (PM2.5) emissions control requirements, saying in final briefs that taking the approach sought by advocates would be unlawful under the Clean Air Act and would also be unnecessary for some areas. The suit , WildEarth Guardians, et al. v. EPA, pending in the U.S. Court of Appeals for the District of Columbia Circuit, is an important test for how the agency...