Debate over biofuels, food supply intensifies

We Americans have happily given our cars the run of the country, paving over a good 40 percent of our cities so they can roam unfettered, and generously ceded a big chunk of our hard-earned homes to keep them warm and dry. But apparently that's not enough. Now some interests are suggesting that, in order to keep our four-wheeled friends tanked up at all costs, we share our food supply with them as well.

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