Columbia’s waste stream roughly contains three categories, each one regulated differently. Solid waste comprises most of what’s tossed into the trash can or often voluntarily recycled: copier paper, cardboard, toner cartridges, and in some cases, cans and bottles. Universal waste consists of materials collected and recycled under the supervision of Environmental Health & Safety: computers, fluorescent lamps and the Medical Center’s 1,900 pounds of batteries annually. Hazardous waste, such as silver, dental amalgams and solvents, is also carefully regulated. The EPA recently upgraded its recycling system, which the University’s environmental offices have implemented and audit regularly.

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