This story is a collaboration between Inside Climate News and Sentient Media. More than a thousand hogs grow fat in the enclosed shed-like structures on Gene Tinker’s farm in northeast Iowa, while a few hundred cattle pace in open feedlots. His farm is one of nearly 8,000 concentrated animal feeding operations (CAFOs) in Iowa. But … Continue reading Factory Farms in Iowa Generate 110 Billion Pounds of Manure Per Year. No One Tracks Where It’s Going.