The average increase in fuel economy in the auto industry is due in part to the advancements in hybrid technology, but also because auto manufacturers have made their gas-powered cars more efficient. The average fuel economy for new cars in the U.S. has risen from 24.3 mpg in 1980, to 28.0 mpg in 1990, 28.5 mpg in 2000 and most recently was calculated to be 31.2 mpg in 2008.
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