The Texas Commission on Environmental Quality and Luminant Generation filed petitions August 6 in the U.S. Court of Appeals for the District of Columbia Circuit and the U.S. Court of Appeals for the Fifth Circuit to review the Environmental Protection Agency’s Cross-State Pollution Rule to reduce regional haze. The agency determined that the cross-state rule, which allows 28 states to use the emissions trading program instead of requiring best available retrofit technology for power plants in order to reduce interstate transport of nitrogen oxides and sulfur dioxide.