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Bush Signs Fuel Efficiency Bill To Combat Oil Dependency, Global Warning

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President Bush signed into law Wednesday legislation that will bring more fuel-efficient vehicles into auto showrooms and require wider use of ethanol, calling it "a major step" toward energy independence and easing global warming.

The legislation signed by Bush at a ceremony at the Energy Department requires automakers to increase fuel efficiency by 40 percent to an industry average 35 miles per gallon by 2020. It also ramps up production of ethanol use to 36 billion gallons a year by 2022.