Quietly, on roughly half of America’s farms, sustainable farming is taking root. Across the Midwest farmers who collectively grow crops on 45 million acres of land and sell their crops to companies like General Mills and Unilever, are implementing a program called SUSTAIN. The program provides those farmers with the new technologies and practices needed to farm sustainably. Environmentally, the farming technique reduces soil erosion and nitrogen contamination of groundwater. It also requires less fertilizer, one of the largest expenses for a farmer.