In 2007, Congress expanded the Renewable Fuels Standard (RFS) to require 36 billion gallons of conventional (corn) and advanced (cellulosic, biodiesel, and “drop-ins”) biofuel to be blended into America’s gasoline and diesel fuel supplies by 2022. Congress hoped that turning food, plants, and other bio-sources into alternative fuels would help achieve US energy independence and improve the environment, but it’s not working out that way.