The United States Environmental Protection Agency (US-EPA) announced the finalization of an "expanded" National Renewable Fuel Standard Program, commonly called "RFS". The RFS is a component of federal energy legislation (the Energy Independence and Security Act of 2007) in the United States, setting the number of gallons of renewable fuels to be used in the country's transport fuel supply each year. It includes biofuels, such as ethanol and biodiesel. The revisions in the finalized RFS program (as mentioned in the US-EPA website) include: (1) revised statutory requirements establishing "new specific annual volume standards for cellulosic biofuel, biomass-based diesel, advanced biofuel, and total renewable fuel that must be used in transportation fuel", (2) revised statutory requirements to include new definitions and criteria for both renewable fuels and the feedstocks used to produce them, including new greenhouse gas emission (GHG) thresholds as determined by lifecycle analysis. In the draft version released several months ago, the EPA's method for indirect land-use" calculations in the lifecycle greenhouse gas analysis indicated that "corn ethanol was found to have a higher carbon footprint than an equal gallon of gasoline – and thus would not qualify under the RFS". Under the finalized version, the EPA ruled that corn ethanol produced from "new or expanded capacity from an existing natural gas-fired facility using advanced efficient technologies" complies with the 20% GHG emission threshold, and would qualify under the finalized RFS. The agency cited the following as bases for the new decision: (1) "significant new scientific data available to the agency", (2) "rigorous independent peer review", and (3)"extensive public comments"..