According to the Office of Energy Efficiency and Renewable Energy, Americans spend more than $160 billion a year on energy. This energy -- used to heat, cool, light, and otherwise keep our homes running smoothly -- represents about 21 percent of the nation's total energy use. But our impact could be smaller. Take the time to implement even a few of the following energy-efficient improvements, and the results could cut your total energy consumption by up to 30 percent.
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