Twenty-eight states have ethanol facilities which are producing 14.2 billion gallons of corn ethanol per year. Iowa produces 25% of the nation's ethanol, and Nebraska comes in second, producing 14% or 1.96 billion gallons.Sources: Renewable Fuels Association, Washington, DC.Nebraska Energy Office, Lincoln, NE.Data updated September 26, 2011Having just returned from a trip to Eastern Nebraska, I