7 amazing facts about energy efficiency

. . . . that 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.

. . . . that Americans are now using public transit at record levels but if they used it at the same rate as Europeans