SWOOPE, VA - MARCH 26 Pasture-based farmer Joel Salatin watches his cows move to a different part of the property at Polyface Farms in Swoope, Va. on March 26, 2015. Salatin is one of the heroes of the sustainable-food movement, and he appeals to both left- and right-wing audiences.  (Photo by Greg Kahn/GRAIN for The Washington Post)
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