In a per curiam opinion, a divided en banc Fifth Circuit affirmed a district court's civil penalty award of $14.25 million against an oil company in a long-running dispute concerning alleged CAA permit violations at an industrial complex in Baytown, Texas. Environmental groups had filed a CAA citize...

A district court denied industry groups' motion for summary judgment in a challenge to California's adoption of an emissions regulation for railroads operating within the state. The groups argued that the regulation, which would require companies to phase out locomotives that are more than 23 years ...