EPA is issuing a regulation to require reporting of greenhouse gas (GHG) emissions from all sectors of the economy in the United States. The final rule applies to fossil fuel suppliers and industrial gas suppliers, direct greenhouse gas emitters and manufacturers of vehicles and engines outside of the light-duty sector 1. The rule does not require control of GHGs, rather it requires only that sources above certain threshold levels monitor and report emissions. EPA’s analysis shows that the rule will not affect homeowners, small businesses, schools, or commercial establishments such as drycleaners or retail stores. This rule was prepared in accordance with the FY2008 Consolidated Appropriations Act, which was signed into law in December 2007. EPA issued the rule pursuant to its authority under the Clean Air Act.