The Energy Independence and Security Act of 2007, commonly referred to as EISA, amended the Federal Renewable Fuel Standard (RFS) by mandating specific quantities and types of renewable transportation fuels for each year – known as the yearly "applicable volume." The applicable volume for a particular fuel (conventional biofuel, advanced biofuel, cellulosic biofuel, biomass-based diesel) determines the quantity fuel refiners, importers and blenders much purchase each year. The below graph illustrates the statutory legal requirements for renewable transportation fuels under the RFS....
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