小组计算出，一旦双重的分解进化开始完全生效，死去的树木将会释放出超过50亿吨的二氧化碳。
The team calculates that once that decomposition process has kicked in completely, the dead trees will release over time some 5 billion tons of CO2.
2005年2月16日正式生效的《京都议定书》，就是规范和约束各国排放二氧化碳等温室气体的国际协定。
On 16 February 2005 the Kyoto Protocol entered into force which is a international agreement to norm and constraint each country of the emissions of carbon dioxide and other greenhouse gases.
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