Although fluorescent and HID lighting save energy and money, they do present special disposal considerations. Fluorescent and HID lamps (as well as some types of neon lamps)
contain mercury and in most cases are considered to be hazardous wastes when disposed. Although the amount of mercury in each lamp is small, several million lamps are discarded
by many businesses around the world, making these lamps one of the largest sources of mercury in our garbage. When a lamp is broken or placed in a landfill or incinerator...
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