These days, U.S. farm policy is blamed for a lot of things - even the nation's obesity epidemic.The idea is that the roughly $15 billion in annual subsidies that the federal government gives to farmers encourages them to grow too much grain. As a result, the theory goes, prices drop, food gets cheaper and we end up eating too much. Seems like a simple equation. But as KCUR's Frank Morris reports, it's not.
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