Harvest Power converts waste into biofuel, compost, mulch and fertilizer. The company is the largest processor of yard and food waste in North America, managing 1.8 million tons of organic materials each year. They operate over 25 processing facilities, with more than 450 employees. The company also sells around 40 million bags of soil, mulch, and fertilizer to retail outlets like Walmart. Founded in 2008 by Paul Sellew, Harvest Power is headquartered in Waltham, Massachusetts.