EPA just released thepreamble (PDF:1.18MB) and proposed rules for the first comprehensive mandatory national reporting system for the emission of greenhouse gases. If promulgated, these rules will require large suppliers of fossil fuels or industrial greenhouse gases, manufacturers of vehicles and engines, and facilities that emit 25,000 metric tons or more per year of greenhouse gases to submit annual reports to EPA, beginning in 2011. The proposed rule covers carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and other fluorinated gases including nitrogen trifluoride and hydrofluorinated ethers. About 13,000 facilities in the chemicals, oil, cement, iron and steel, and automobile industries (believed to emit 85 to 90 percent of U.S. greenhouse gas emissions) would be required to report their emissions. Most small business would be exempt because they would not exceed threshold emissions limits.