EPA has published a request for comments on its Draft Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2009. 76 Fed. Reg. 10,026 (2/23/11). The document contains estimates of carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride. It also includes estimates of carbon fluxes in U.S. agricultural and forest lands. EPA requests comments by March 25, 2011.