If the price of a gallon of gasoline hasn't gotten your
attention lately, concerns about the environmental impacts of America's fossil
fuel addiction or national energy security likely have. In the face of such
challenges, alternative fuels are rapidly being developed and commercialized.
Minnesota farmers were among the first to answer the call,
producing ethanol, a "first generation" biofuel. In the United States, ethanol
is produced primarily from corn. Globally, ethanol is made from a wide variety