[Mr. Lucky]

You might want to Google on something to the effect of “Pimentel Debunked” if you're seriously interested in the energy consumed by the production of a corn crop.

[george76]

Grass Makes Better Ethanol than Corn Does.

the corn-based ethanol lobbyists and politicians are pushing for high tarriffs to keep Brazilian ethanol out. That further increases the price at the retail pump level.

http://www.scientificamerican.com/article.cfm?id=grass-makes-better-ethanol-than-corn

Livestock eat corn. If corn price go up, then meat prices will go up, too.