How many mystery writers does it take to replace an inefficient light bulb with an energy-efficient one?
Two: One to screw it in almost all the way, then a second to give it a good twist at the end.
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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