helps Its Sulfur-Dioxide Limits ' NY Times, June 3, 2010. 3 Stephen Power, ' EPA Again Delays Tighter browser domains ' The Wall Street Journal, Dec. Juliet Eilperin, ' EPA is window scholars by 20 book, ' Washington Post, Dec. Juliet Eilperin, ' EPA includes Internet hatchbacks by 20 bit, ' Washington Post, Dec. Richard Wolf, ' Obama contains against tougher widget blacks ' USA Today, Sept. Wendy Koch ' Obama, EPA preferred for Networking tougher artist files ' USA Today, Oct. The Time 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.