A and fewer cars means less pollution and fewer traffic jams.

A私家车的减少意味着污染和交通堵塞的减少。

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Fewer cars means fewer traffic jams.

私家车的减少意味着交通堵塞的减少。

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More choice is often not better: Research with gourmet jams has found people can be happier, and even better motivated, when they have fewer options to choose from.

更多选择不一定更好：研究表明，对美食果酱的调查发现当选择数目更少，人们会更快乐，甚至动力更大。

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But there's only one sure-fire way to reduce air traffic jams: put fewer planes in the sky.

FORBES: Fuel Costs Could Trim Summer Air Travel. A Bit.

Fewer car journeys means less pollution, fewer road accidents and shorter traffic jams, all of which would be welcomed my many.

BBC: How are motorists saving fuel?