The Renewable Fuel Standard (RFS) program, which mandates the commercialization of biofuels through 2022, is the United States’ most significant piece of legislation regarding renewable energy. It was first passed in 2005 and revised and expanded in 2007 in order to create a viable market for biofuels based on the policy goals of enhancing domestic U.S. energy security, reducing transportation-related greenhouse gas (GHG) emissions, and stimulating rural economic development. The RFS requires minimum levels of consumption for different kinds of biofuels and requires increasing blending amounts of biofuels into gasoline and diesel fuels by producers and importers each year. Mandates and targets for biofuels as required by the RFS are not a p...