Is 'Factory Farming' a Danger to Public Health?

Twenty-five hundred cows produce as much waste as a city the size of Miami; many new, so-called "factory" farms are larger than that. Factory farms, officially called Concentrated Animal Feeding Operations or CAFO's, are on the rise, with thousands of cattle, pigs and poultry all in the same space, producing millions of gallons of waste. But the waste from animals is not regulated like human waste, and there's widespread concern that it's polluting water supplies in many places. Now the EPA is under fire for failing even to gather enough information to find out how big the problem might be.