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Study: Air travel outpacing driving in fuel efficiency gains http://apocadocs.com/s.pl?1389629117
Conventional wisdom says that driving a relatively fuel-efficient car is usually better for the environment than flying.
That may no longer be the case, though, according to new calculations from the University of Michigan's Transportation Research Institute.... matching the fuel intensity of an average flight now requires a car get at least 33.8 mpg or have more than two occupants.
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[Read more stories about:
carbon emissions, efficiency increase]
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