Despite ongoing concerns about the United States' vast appetite for petroleum in general and foreign oil in particular, Washington has taken only piecemeal measures to address the challenge. Collectively, these efforts will have only a small impact on the amount of oil the country consumes.rnIn April, the U.S. Environmental Protection Agency and the Department ofrnTransportation tightened fuel economy regulations: cars will be required to achieve an average of 35.5 miles per gallon starting in 2016, up from 27.5 today.
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