The Draft Inventory is available for public review. Annual U.S. emissions for the period of time from 1990 through 2006 are summarized and presented by source category and sector. The inventory contains estimates of carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFC), perfluorocarbons (PFC), and sulfur hexafluoride (SF6) emissions. The inventory also includes estimates of carbon fluxes in U.S. agricultural and forest lands. The technical approach used in this report to estimate emissions and sinks for greenhouse gases is consistent with the methodologies recommended by the Intergovernmental Panel on Climate Change (IPCC), and reported in a format consistent with the United Nations Framework Convention on Climate Change (UNFCCC) reporting guidelines. The Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2006 is the latest in a series of annual U.S. submissions to the Secretariat of the UNFCCC. Please submit your comments by April 7, 2008. The POC is Mr. Leif Hockstad, Environmental Protection Agency, Office of Air and Radiation, Office of Atmospheric Programs, Climate Change Division, (202) 343-9432, hockstad.leif@epa.gov (Federal Register: March 7, 2008 [Notices], Page 12413).