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Climate change 气候变化 Good news at last? 终于来了好消息? The climate may not be as sensitive to carbondioxide as previously believed 气候对二氧化碳的敏感性可能低于先前的预期 CLIMATE science is famously complicated, 气候科学的复杂程度众所周知， but one useful number to keep in mind is climate sensitivity. 但把一个指标记在脑中非常好用，那就是气候敏感性。 This measures the amount of warming that can eventually be expected to follow a doublingin the atmospheric concentration of carbon dioxide. 该指标表示预计大气中二氧化碳浓度翻倍所能引致的升温量。 The Intergovernmental Panel onClimate Change, in its most recent summary of the science behind its predictions, publishedin 2007, estimated that, 政府间气候变化专门委员会在其最近一次关于其预测背后的科学性的概要中估计， in present conditions, a doubling of CO2 would cause warming of about 3C, with uncertaintyof about a degree and a half in either direction. 在如今的情况下，二氧化碳浓度翻倍将造成3C左右的升温，上下误差在1.5度左右。 | 
