Responding to a December 2011 U.S. Court of Appeals for the District of Columbia Circuit ruling, the Environmental Protection Agency proposed changes June 25 to its 2010 air standards for the Portland cement manufacturing industry. The proposal would maintain the significant emissions reductions from the 2010 standards while providing industry additional compliance flexibilities, including more time to implement the proposed updates by extending the compliance date for existing cement kilns from September 2013 to September 2015. The agency will finalize the rule by December 20.