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Mary Turck has penned an insightful and well-reasoned essay on the destructive effects American agricultural practices have on the environment and, in turn, the damage that does to agriculture, itself. She focuses on topsoil and its ongoing depletion from America’s farmlands. “Snirt” is the dirty mixture of snow and soil which results from eroded dust contaminating the snow, and it serves as mute testimony to the problem. You can find her article, here: http://america.aljazeera.com/opinions/2015/2/the-failure-of-us-farm-policy-its-in-the-snirt.html