Greenhouse gases trap heat and prevent its escape from the atmosphere into space.

温室气体会蓄热并阻止热量从大气向太空散逸。

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And global warming may drive this trend, he added. As greenhouse gases trap heat in the lower levels of the atmosphere, the higher levels tend to cool, he said.

北极的寒冬将越来越冷，这种长期趋势还会持续下去，他认为，由于温室气体在大气层的较低部位阻挡热量，在较高部位阻挡寒冷，全球变暖将加速这一趋势。

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The Earth’s surface emits infrared radiation it has absorbed from the sun. Greenhouse gases partly trap that energy as heat, keeping the planet habitable.

地球表面释放出从吸收自太阳的红外辐射，温室气体将这种能量作为热部分地保留下来，使得地球成为可以繁衍生息之地。

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One of these changes, which would promote global warming, is a rise in the level of so-called greenhouse gases (particularly carbon dioxide) which trap heat from the sun and thus warm the air.

ECONOMIST: More evidence that global warming is man-made

We're using more and more carbon-based fuels, generating greenhouse gases (such as carbon dioxide) that trap heat from the sun in our atmosphere.

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