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"..the hockey stick is not one of the central lines of evidence for human-caused climate change. It wouldn't matter if there was no hockey stick or any Hockey League. There are now dozens of these sorts of reconstructions and they all come to the same basic conclusion: the recent warming does appear to be unprecedented as far back as we can go. But even if we didn't have that evidence we would still know that humans are warming the planet, changing the climate and that represents a threat if we don't do something about it."
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