How many NC State engineering students does it take to replace an inefficient light bulb with an energy-efficient one?
Five: Three to design a nuclear-powered light bulb that never needs changing, one to install it, and one to write the computer program that controls the wall switch.
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A significant amount of the average home energy bill pays for heating water. Take five-minute showers instead of baths and make sure your water heater is set no higher than 120° F.
Source: U.S. Department of Energy
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