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Fact Sheet: Building Energy Efficiency
Buildings consume about 40 percent of all energy used in the United States and are responsible for about 40 percent of all U.S. carbon dioxide emissions. Efficient buildings reduce the speed and severity of global warming, lesson demand on the power grid, decrease stress on natural gas supplies, improve local air quality and save consumers money.
Improving energy efficiency in existing buildings is a key component of national energy efficiency policy. While new building design and construction is the least-cost way to improve building energy efficiency, only two percent of the building stock is replaced each year. Thus, advancing energy efficiency in existing buildings represents an important opportunity to address immediate energy and climate challenges.
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