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Plan B for climate change

机译：应对气候变化的计划B

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Ever thought about tackling climate change by spraying aerosols into the upper atmosphere to act as a giant sunblock? Or how about placing trillions of tiny parasols in space to divert solar radiation? Or perhaps fertilizing the oceans with iron to promote artificial blooms of phytoplankton that can soak up carbon dioxide? The problem with these and other proposed "geoengineering" techniques is that they sound so crazy, expensive and dangerous that many mainstream climate scientists have refused to take such solutions seriously. Indeed, some fear that even discussing geoengineering is enough to scupper climate negotiations, such as those that are due to take place in Copenhagen in December, by implying that we do not need to bother cutting greenhouse-gas emissions.
机译：是否曾想过通过向高层大气中喷洒气溶胶来充当巨大的防晒霜来应对气候变化？还是在太空中放置数万亿个微小的阳伞来转移太阳辐射呢？还是用铁肥海洋以促进浮游植物的人造花并吸收二氧化碳？这些和其他提议的“地球工程”技术的问题在于它们听起来如此疯狂，昂贵和危险，以致许多主流气候科学家拒绝认真对待这种解决方案。确实，有些人担心甚至讨论地球工程也足以破坏气候谈判，例如定于12月在哥本哈根举行的气候谈判，这暗示我们不需要费心减少温室气体的排放。

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