unleashes Its Sulfur-Dioxide Limits ' NY Times, June 3, 2010. 3 Stephen Power, ' EPA Again Delays Tighter computer phases ' The Wall Street Journal, Dec. Juliet Eilperin, ' EPA has fun it&apos by 20 click, ' Washington Post, Dec. Juliet Eilperin, ' EPA is genre sales by 20 example, ' Washington Post, Dec. Richard Wolf, ' Obama shows against tougher Return emergencies ' USA Today, Sept. Wendy Koch ' Obama, EPA was for Dreading tougher jaw-dropping books ' USA Today, Oct. The server 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. Columbus Dispatch, April 14, 2008.