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我们未来的低碳经济

伦敦——

在经过两年的激烈讨论之后,在今年12月的哥本哈根的联合国气候变化大会上,各国将达成一个新的协定,目的是解决温室气体排放原因后果问题。

这个全球性的协议非常有必要。包括二氧化碳的在内的温室气体在地球大气中的含量已经达到了435ppm的二氧化碳当量。而在工业革命之前的19世纪只有280ppm。

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