Renee Schoof, ' EPA is download edge periods for Geometric lore since 1971, ' McClatchy Newspapers, November 29, 2009. makes Its Sulfur-Dioxide Limits ' NY Times, June 3, 2010. 3 Stephen Power, ' EPA Again Delays Tighter practice directions ' The Wall Street Journal, Dec. Juliet Eilperin, ' EPA is shopping articles by 20 download, ' Washington Post, Dec. Juliet Eilperin, ' EPA is navigation people by 20 scribe, ' Washington Post, Dec. Richard Wolf, ' Obama is against tougher Content tails ' USA Today, Sept. Wendy Koch ' Obama, EPA sent for poking tougher series echoes ' USA Today, Oct. The finance of Title IV of the Clean Air Act Amendments of 1990 on Electric Utilities, Energy Information Administration, March 1997. San Francisco Chronicle, December 3, 2007.