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The biofuel mania that has gripped the US heartland is creating some big winners, and a lot of losers, including many farmers in the US and billions of hungry people around the world. Corn ethanol isn't doing much to improve the score against global warming either. Piece together a few recent reports, and you'll arrive at this conclusion: we can lick global warming in a hurry if we harness "market forces" properly -- and not leave it up to the biggest, greediest and fastest actors to respond from raw self-interest alone.