In Seattle, wasting food will now earn you a scarlet letter — well, a scarlet tag, to be more accurate. The bright red tag, posted on a garbage bin, tells everyone who sees it that you've violated a new city law that makes it illegal to put food into trash cans. "I'm sure neighbors are going to see these on their other neighbors' cans," says Rodney Watkins, a lead driver for Recology CleanScapes, a waste contractor for the city. He's on the front lines of enforcing these rules. Seattle is the first city in the nation to fine homeowners for...