Turning food into fuel is a bad idea

"Famine," observes Dennis Avery, the director of the Hudson Institute's Center for Global Food Issues, "is a human society's ultimate failure. Tightening the world's food supply by diverting major quantities of its grain stocks into fuels will drive up the prices of all food. This will inevitably hit hardest at the poorest people in the world's food-shortage regions. This would not be ethical even if there were no other sources of energy."

Then there's this:

one-third of the world's grain is now fed to animals to produce meat. If we're really worried about the world's poor, shouldn't we give up not only SUVs, but brisket, bacon and breasts too? The amount of grain that actually goes into producing a pound of meat is controversial. However, the non-profit consortium of 37 scientific societies, the Council on Agricultural Science and Technology estimates that it takes around 3 kilograms of grains to produce 1 kilogram of meat.