Sharon Sarmiento

The October 1973 oil price shock made everyone realize how much energy Americans use for transportation-over a quarter of total U.S. energy use (Table 1). By 1993 energy consumption for transportation reached 22.83 quadrillion BTU (British thermal units), of which over 70 percent was used for passenger travel. Not surprisingly, automobile travel accounted for over 40 percent of all energy expended for transportation (Table 2).

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