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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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.

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