Amidst high fuel costs and a governmental push to become less dependent on foreign oil, the United States has launched one of the largest renewable fuel efforts in the world -- rivaled only by Brazil. But unlike Brazil, the U.S. was ushered into the renewable fuels era utilizing corn crops as the primary input. Although corn was relatively cheap during the early phases of the U.S. ethanol boom, rising commodity and food prices have placed increased urgency on the development of cellulosic or second generation ethanol.