Emissions of Greenhouse Gases in the United States: 2004. Executive Summary. By the U.S. Energy Information Administration. Published March 2006. 15 pages. This item (like all other documents in this catalog) is free of charge. The full report [PDF] (dtd Dec 2005) is available online at ftp://ftp.eia.doe.gov/pub/oiaf/1605/cdrom/pdf/ggrpt/057304.pdf.