What Happened to the Switchgrass?

Or: Why is All Our Ethanol Made from Corn?
The Energy Policy Act of 2005 was signed into law by George W. Bush and created the Renewable Fuel Standard (RFS). Among other things, the RFS set goals for the amount of renewable biofuels to be blended into the nation’s petroleum fuel supply. That meant gasoline would contain ethanol and biodiesel would be blended into diesel fuel. At the time the domestic source for almost all that ethanol was corn. But corn was not supposed to be the sole source. Over time, corn was supposed to be supplanted with other sources of ethanol.

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