The search for alternative fuel sources has led to the development of ethanol, a gasoline substitute, but large-scale production of corn-based ethanol is controversial and it threatens the world’s food supply. In Alcohol Fuel: A Guide to Small-Scale Ethanol (New Society Publishing, 2009), Richard Freudenberger gives readers all the information they need create a small-scale ethanol plant. In this excerpt from Chapter 4, he covers all the production aspec