如果你想出游并且尽量减少对气候的影响，你的最佳选择就是乘火车，公共汽车，或者乘船，据一项新的研究发现，飞机是稍次的选择，自驾车最差。

If you have to travel and you want to make as little impact as possible on the climate, your best bet is to go by train, bus or even ship, found a new study. Airplanes are the next best option.

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