Is Ethanol a Viable Alternative Fuel?

In June of 2006, the answer would have been a resounding yes; ethanol was selling for as much as $5 a gallon at that time. Now, we're not so sure. Ethanol is highly subsidized, offerring oil refineries alone over 50 cents per gallon when mixed with gasoline. But serious environmental concerns have arisen, including fears of air pollution caused by producing ethanol, along with speculation that ethanol production is contributing to the rising cost of food.

Fuel Cells, anyone?