It is, unfortunately, society’s nature to discard the unwanted or forgotten. This tendency is on display across the globe, from slums of mega-cities to undernourished children in rural villages to the ugly endangered creatures that never receive attention. Nowhere, however, is this tendency more apparent than in our trash. We accumulate so much unwanted stuff that each city-dweller throws away an average of 1.2 kilograms of municipal solid waste per day. An individual’s trash puts all those unwanted items on display, whether it is an old love letter, a broken glass, or a half-eaten ham and cheese sandwich.