From an ecological standpoint, the fundamental problem with U.S. farm policy dating back to the '70s is that it rewards farmers for maximizing yield at all cost. Encouraged to produce as much as possible, all the time, farmers have few incentives to conserve resources or protect water, air, or soil quality. The federal government's dizzying array of biofuel subsidies -- which have propped up crop prices and encouraged yet more production -- only exacerbates the situation. I don't think greens fully appreciate the ecological troubles associated with these policies. Peter Donovan's recent post showed how agriculture has vast -- and …
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