atmospheric carbon

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1.
More than 90 percent of the matter that makes up trees was once water and free-floating atmospheric carbon dioxide.
形成一棵树所需的物质里，90%都来自于水分和空气中的二氧化碳。
article.yeeyan.org
2.
An observed long-term increase in the number of these clouds may be due in part to the rise in atmospheric carbon dioxide levels, he says.
一项调查表明夜光云数量的长期增长可能在某种程度上跟大气层中二氧化碳含量的增加有关。
article.yeeyan.org
3.
The breakdown of a portion of this matter by bacteria in the sediment contributes significantly to atmospheric carbon dioxide.
沉积物中细菌对这一部分物质的分解极大影响着大气二氧化碳。
article.yeeyan.org
4.
In the scant century and a half since then, we've bumped atmospheric carbon dioxide up to 390 ppm.
在不到一个半世纪后，我们把大气中的二氧化碳猛增到百万分之390。
article.yeeyan.org
5.
Without the activities of these free-floating plant like organisms, atmospheric carbon dioxide levels would triple.
要是少了这些浮游植物的作用，大气层的二氧化碳浓度将升至三倍。
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6.
The actual increase in the forest and paper coverage area and improve the content of the atmospheric carbon dioxide.
造纸业实际增加了树林覆盖面积，改善了大气二氧化碳含量。
harmony.us.kg
7.
Cars are a major source of atmospheric carbon dioxide, the main greenhouse gas that causes global warming.
汽车是大气中二氧化碳的主要来源，而二氧化碳又直接导致了温室效应。
article.yeeyan.org
8.
Global temperatures could be less sensitive to changing atmospheric carbon dioxide (CO2) levels than previously thought, a study suggests.
一项研究称，大气中CO2水平对全球气候的影响，可能没有人们之前预测的敏感。
article.yeeyan.org
9.
Global warming forecasts predict higher concentrations of atmospheric carbon dioxide.
全球气候变暖预示这大气中的二氧化碳含量更高。
q.sohu.com
10.
This causes plants to die, and provides more opportunities for wildfires, increasing the atmospheric carbon-dioxide level.
这会导致植被的死亡，并且产生野火的隐患，提高了大气二氧化碳的含量水平。
www.ecocn.org