Senate has proposed raising fuel efficiency requirements on all vehicles, giving auto makers until 2020 to increase fuel economy for an average of 35 mpg for all cars, trucks and SUVs. That is about 40 percent higher than the current average. The proposal is a response to concerns about energy security without hurting domestic auto makers.



Under the new proposal released by Senators Daniel Inouye, of Hawaii, and Ted Stevens of Alaska, cars and trucks will have to meet a 4% annual increase in efficiency after 2020.



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