I commented several times on the stupidity of corn-based ethanol as a substitute for gasoline. It’s a very inefficient process and provides fuel at the expense of food. Already ethanol is raising the cost of growing livestock.
However, cellulosic ethanol (alcohol made from the other parts of plants, not from the edible portion) has great promise.
With Cellulosic Ethanol, There Is No Food Vs. Fuel Debate. Science Daily.