"Hogs are big business in Missouri, home to 280 'concentrated animal-feeding operations,' and the country’s seventh-biggest pork producer last year. But the honor is a dubious one to a farm’s downwind neighbors, not to mention to environmental advocates who worry about the untreated manure in vast waste lagoons. Enter the executives at Innoventor, a design-build firm based in St. Louis, who, with the help of almost $1 million from the Environmental Protection Agency, have created a contraption that recycles pig waste for road-paving and roofing products. The technology, which Innoventor believes has billion-dollar potential, eliminates the need for manure lagoons and could reduce reliance on fossil fuels."