当然，二氧化碳与温度的相关性并不能确定是大气成分的变化导致了气候变暖或变冷的趋势，还是它们本身造成的。

The correlation of carbon dioxide with temperature, of course, does not establish whether changes in atmospheric composition caused the warming and cooling trends or were caused by them.

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我们不能让大气中的二氧化碳无限制地升高。

We cannot let the CO2 in the atmosphere rise indefinitely.

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但这些新的气候变化行动并不能取代减少二氧化碳排放这个需求。

But these new types of climate action do not replace the need to reduce carbon emissions.

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