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汉语拼音：èr yǎng huà tàn

无机化合物，化学式CO2。无色无臭的气体，比空气重，空气中含量约为0.04%。动物呼吸时吸入氧气，呼出二氧化碳；绿色植物进行光合作用时放出氧气，吸入二氧化碳。用来制纯碱、清凉性饮料等，也用来灭火。是大气中的温室气体之一，应控制它的过量排放。旧称碳酸气。

• Climate scientists have suspected - but never been able to prove - that the CO2 was the result of a huge belch of gas from the oceans.

  气候学家猜测——但仍未被证明——二氧化碳是来自海洋的大规模气体喷发的结果。

• You know, breathing high concentrations here of sulfur dioxide, carbon dioxide and methane gas, in unequal quantities -- 19 years of this.

  你知道，呼吸这里高浓度的二氧化硫、二氧化碳、和甲烷气体，这些不等量的气体-19年都是如此。

• Then he adds that in order to get CO2 to zero, "probably one of these numbers is going to have to get pretty close to zero. "

  然后他补充，要使二氧化碳排放量达到零，“或许这些数字其中一须要到非常接近零。”

• It was badly cold, it had a very thin atmosphere and that atmosphere was mostly carbon dioxide.

  那里很寒冷，大气很稀薄，大部分都是二氧化碳。

• So far, the rise in carbon dioxide seems to be fairly smooth over time, but the change in vegetation is jerkier .

  到目前为止，似乎二氧化碳随着时间变化而增加的幅度相当平稳，但植被的变化却有更大的波动。

• More to the point, it'll keep more than half a ton of climate-changing carbon dioxide out of the atmosphere every year.

  更重要的是，它可以保持每年半吨由于气候变化形成的二氧化碳不会跑出大气。

• Then, of course, there's all that CO2 from this material that ends up in the atmosphere.

  接下来，当然，是这份材料中所显示的被排放在大气层中的二氧化碳。

• As Ed Miliband, the UK climate secretary, put it, a limit to carbon dioxide emissions is the "big prize" to be won at Copenhagen.

  用英国气候变化大臣爱德华•米利班德（EdMiliband）的话来说，限制二氧化碳的排放量，是要在哥本哈根拿下的“大奖”。

• All that extra carbon dioxide, however, has been a bitter pill for the ocean to swallow.

  然而，海洋并不能吸收掉所有这些额外的二氧化碳。