The D.C. Circuit denied a petition for review challenging EPA's decision granting California a waiver from federal preemption under the CAA that allows the state to implement its own regulations requiring automobile manufacturers to reduce fleet-average greenhouse gas emissions from new motor vehicl...

A district court denied two aviation associations' motions to intervene in a case asking the court to order EPA to use its authority under the CAA to regulate greenhouse gas emissions from marine vessels, aircraft, and other nonroad vehicles. The aviation associations filed the instant motions to in...