Government charges that Hyundai nonroad vehicles didn't meet updated emissions standards.

A federal appeals court in Chicago on Aug. 17 ruled for the Environmental Protection Agency in its Clean Air Act lawsuit against Cinergy Corp. Cincinnati, concluding that it is EPA's duty to determine how emission increases trigger the law's new source review requirements.

Citgo Petroleum Corp., Houston, will spend $320 million on clean air technologies at five of its refineries in five states to reduce polluting emissions under an Oct. 6 settlement with the U.S. Dept. of Justice and the Environmental Protection Agency under the Clean Air Act.

An air-pollution district in metropolitan Los Angeles overstepped its authority when it enacted six "fleet rules" in 2000, the U.S. Supreme Court decided on April 28.