This massive tree-planting scheme aimed to reduce the amount of carbon dioxide in the atmosphere, the cause of global warming.

这个大型植树计划目的在于减少大气中二氧化碳的含量，二氧化碳是造成全球变暖的原因。

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A few days ago, just made a winter, but in winter, it seems, are still at home sleeping in, has been reluctant to come out, more is the cause of global warming.

前几天，刚刚立了冬，但冬天似乎还在家中睡懒觉，迟迟不愿出来，更多的还是全球变暖的原因吧。

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It is believed that greenhouse gases are the main cause of global warming.

人们相信温室气体是全球变暖的主因。

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The gases released include carbon dioxide, a major cause of global warming.

VOA: special.2010.01.05

The report calls for stronger steps to be taken by advanced economies to reduce carbon emissions, seen as the main cause of global warming.

VOA: standard.2009.09.01

If you believe that man-made gases are the cause of global warming, then address methane, which has a much more devastating effect than CO2.

FORBES: ClimateGate Star Michael Mann Courts Legal Disaster

"Methane hydrate was a key cause of the global warming that led to one of the largest extinctions in the earth's history, " Ryo Matsumoto, a professor at the University of Tokyo who has spent 20 years researching the subject, told Bloomberg in December.

FORBES

The plaintiffs, property owners on the Mississippi Gulf Coast, accused the industrial companies of spewing greenhouse gases into the air and helping to cause global warming, rising waters, hurricanes and all manner of other natural disasters.

FORBES: A Messy Loss For Climate Lawsuit Plaintiffs