Thursday, July 1st, 2010 4:46 pm
By the end of 2008 energy efficiency investments had slashed United States energy consumption (as measured per dollar of economic output) to half of what it was in 1970, from 18,000 Btus to about 8,900 Btus; in one year alone such investments are estimated to have generated approximately 1.7 quads of energy savings.
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