That may make it harder and more expensive to keep emissions at the levels needed to prevent average global temperatures rising 2°C from pre-industrial times, some climate experts say. Temperatures have already risen 0.8°C from that era.
一些气候专家表示,这可能会加大以下目标实现的难度和成本:让温室气体排放保持在一定水平上,这个水平是确保全球平均气温不会比前工业时代水平高出2°C以上所必需的。全球平均气温目前已比前工业时代水平升高了0.8°C。
Previous UN climate meetings agreed to the 2°C threshold after scientists warned that warming beyond this level could trigger dangerous climate change.
联合国之前的气候峰会已就气温比前工业时代水平升高幅度不得超过2°C达成一致,此前科学家警告称,气温升幅超出这个幅度可能会引发危险的气候变化。
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