( November 16, 2023, 4:24 PM EST) -- CINCINNATI — Four petitions for judicial review of a Clean Air Act (CAA) plan governing ambient air quality for 23 states must be heard in the District of Columbia Circuit U.S. Court of Appeals because the plan is nationally applicable and is based on a U.S. Environmental Protection Agency determination of nationwide scope, a Sixth Circuit U.S. Court of Appeals panel found in granting the EPA’s motions to transfer the petitions....