Social entrepreneur Mohammad Modarres shines a light on an industry that’s on the cusp of ecological and economic disaster. His suggestion for mitigating catastrophe is simple and actionable: Shop at your local farmers market. In the United States, where some 23 million people live in food deserts that lack access to supermarkets and fresh produce of any kind, shopping at farmers markets may seem like a lofty goal to many. But Modarres’s arguments are as compelling as his statistics are depressing. Those in a position to do so may want to heed his call.