On July 22, in briefs filed in the U.S. Court of Appeals for the District of Columbia Circuit challenging EPA’s new cement kiln standards, environmental groups are defending the EPA’s air pollution standards, while industry is supporting the agency's decision not to require GHG controls. EPA issued final rules in August 2010 revising new source performance standards and setting national standards for hazardous air pollutants emissions for cement manufacturers. The lawsuits were originally filed in November 2010, with industry and environmental groups are challenging different aspects of the rules. On October 11 of this year, oral arguments will be heard.