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"every acre devoted to the growth of fuel is an acre tqaken away from the growth of food."

That's not necessarily true. We export more corn for instance than we convert into ethanol. Much if it is dumped on foreign markets cheap. The Mexicans are raising a big stink about this now because our corn actually sells down there for less than what it costs for them to produce it themselves. We're putting Mexican farmers out of business, and they're getting all upset about it and talking about how "maize" is such an important part of their history and culture and how bad we are for dumping all this cheap corn on their markets. We will never come close to actually replacing all the fuel we burn in our cars with ethanol or biodiesel. We couldn't grow enough feedstock for that. But we aren't anywhere close to cutting into our food supply yet. We still have capacity to grow a lot more biofuel feedstock before that happens. As long as we don't overdo it we'll be fine and we'll be able to supplement our fuel supply, create lots of jobs, and keep more of our money here instead of sending it to crazy Arabs and evil dictators.