I want to warn you that today, I’m going to be talking about poop. Specifically, more than 3.3 billion gallons of it a year, all of it produced in Michigan by what are euphemistically called “Concentrated Animal Feeding Operations,” or CAFOs. Many of us call them “Factory Farms” instead. They are places where animals are crowded in what are anything but humane conditions to be fattened as quickly as possible for slaughter, or if they are cows, drained of their milk. But beyond animal cruelty,