The results showed that the interaction of doubled CO2 concentrations with drought stress reduced the water consumption and transpiring rates of the saplings effectively.

结果表明，在各干旱胁迫水平下，CO2浓度倍增有效地降低了幼树的蒸腾耗水量和耗水速率。

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Furthermore, sea level fluctuated tens of meters during this interval, suggesting a highly volatile East Antarctic Ice Sheet when CO2 concentrations were near this threshold value.

此外，海平面在数十米区间内的波动，表明在二氧化碳接近这个临界值时东南极洲冰盖会产生剧烈蒸发。

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If plants grow in Chambers with high concentrations of CO2, yields rise a lot (which is why tomato farmers and others use CO2 in their greenhouses).

如果在室内种植作物，高浓度的二氧化碳会极大地提高产量(这就解释了为什么西红柿种植户和其他人在温室里使用二氧化碳)。

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They were represented to purport a direct causal fit, suggesting that increased atmospheric CO2 concentrations produce warming.

FORBES: How Climate Sanity Has Been Gored

If carbon dioxide (CO2) emissions continue at current rates, atmospheric CO2 concentrations are expected to double by 2050.

BBC: Forest in snow 1998 EyeWire,Inc.

This is no surprise since plants and animals evolved when CO2 concentrations were about 10 times larger than they are today.

WSJ: Sixteen Concerned Scientists: No Need to Panic About Global Warming