The Renewable Fuel Standard (RFS) is an American federal program that requires transportation fuel sold in the United States to contain a minimum volume of renewable fuels.

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A cellulosic biofuel reality check

Congress established the mandate for cellulosic biofuel under the RFS in 2007. The basic idea was that requiring ambitious volumes of cellulosic fuel to be incorporated into the fuel supply would create and simultaneously mature the market for cellulosic ethanol and biofuels, but that’s not what happened.