Local food enthusiasts have been trying to make the case that buying food from farmers nearby supports local economies, boosts food security and is better for the environment.
But so far, "local" food still makes up a pretty small fraction of what Americans eat. And given that most agriculture in the U.S. is geared toward producing food crops — from corn to soybeans to almonds — for the global market, it doesn't seem likely that will change.
But according to a recent study by researchers at the University of California, Merced, it's actually possible to grow a lot more food closer to our cities.
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