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段落1

This is Scientific American 60-Second Earth. I'm David Biello. Your minute begins now.

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Quick: which saves more fuel?

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Boosting miles per gallon from 10 to 11? Or from 33 to 50? Neither.

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They both save the same amount, one gallon of gasoline every 100 miles.

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And that's why some behavioral scientists think gallons per mile is a better metric.

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Because it tells you exactly how much fuel your car will burn per mile traveled.

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As a result, the U.S.Environmental Protection Agency added gallons per 100 miles to fuel economy labels in 2013.

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Now new research suggests that's not the only way to better inform new car buyers of the fuel efficiency of their vehicle.

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To test what works best, management researchers at Duke University's business school offered would-be car buyers a host of labeling options in an experiment.

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The labels ranged from gallons of gas used per 100 miles to cost of gas over 100,000 miles.

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When consumers saw that cost-of-gas label, they picked the most fuel efficient car every time.

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The research appeared in the Journal of Public Policy & Marketing.

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The finding suggests that cost is the main driver for people to opt for fuel efficiency.

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And if lifetime fuel cost is what matters, maybe that ought to be on the new car labels too.

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Your minute is up, for Scientific American 60-Second Earth. I'm David Biello.

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