摘要：Achieving the U.S. goal to triple biofuel use by 2022 will depend on rapid expansion in cellulosic biofuels, and U.S. agriculture, as a leading source of the Nation’s biomass, will play a significant role in this expansion. The U.S. Environmental Protection Agency announced that the cellulosic biofuel mandate for 2010 would be reduced from 100 million gallons to 6.5 million gallons. Blending and shipping constraints may encourage investors to turn away from cellulosic ethanol in favor of processes that yield green fuels, more closely substitutable for fossil fuels.
