The compact Volkswagen Beetle has always been a fuel-efficient car, but what about applying that conservationist model to a house?

大众甲虫小型轿车一直以来以省油著称，但如果将其环保主义应用于房屋又会怎样呢？

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"At a per-passenger-mile basis, rail is about three times as efficient as travel by car, in terms of fuel efficiency, and six times as efficient as travel by air, so there are pretty substantial pollution reduction benefits both in terms of greenhouse gases and other pollutants."

VOA: standard.2010.02.15

And, of course, a hybrid or fuel-efficient car emits less carbon dioxide than an SUV.

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And, yes, choosing a more fuel-efficient car can indeed be a significant cost-saving measure.

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You say, it's going to be more expensive for you if you've got a less fuel-efficient car.

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