But climate change has another effect: It changes patterns of global air circulation.

但是气候变化还有另外一个影响，即它可以改变空气循环的模式。

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Last week, it was reported that global air cargo traffic in December 2008 was down 22.6 per cent compared with December 2007.

上周，报告显示2008年12月全球的航空货运量与2007年同期相比下降了22.6%。

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Trees and other plants help keep the planet cool, but rising levels of carbon dioxide in the atmosphere are turning down this global air conditioner.

林木和其他类植物可以维持星球适宜温度，但是大气中二氧化碳浓度的增加会减低这种调节作用。

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State-owned media quote the president as saying he is dissatisfied with this month's global-warming summit in Copenhagen, calling it "a lot of hot air."

VOA: standard.2009.12.25

The International Air Transport Association says global carriers are losing an estimated $200 million a day in revenue as a result of airplane groundings related to the Iceland volcano.

VOA: standard.2010.04.19

Over the same two decades, global air travel doubled growing to four trillion RPKs (revenue passenger kilometers).

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U.S. carriers may not be the international brand of choice, but they are leading the recovery in the global air travel sector.

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The rise of bed bugs across the world is attributed to a number of causes especially the increase in global air travel.

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