Drawing it in a cartoon doesn’t make it true. I need, maybe 10 gallons of fuel to plant, fertilize, spray and harvest an acre of corn. That acre will yield 200 bushels, which in turn will yield almost 600 gallons of ethanol and 3,600# of distillers dried grains.
Big Corn and Ethanol Hoax
http://www.townhall.com/columnists/WalterEWilliams/2008/03/12/big_corn_and_ethanol_hoax