Remember the arguments for not taking action against global warming? Just a few years ago the claim was: "There's no evidence that the climate is changing." Then it became: "Well, maybe it is, but humans aren't to blame." That morphed into: "Warmer could be better, and we can easily adapt." And all along, we heard that cutting emissions would cripple the economy—and wouldn't make much difference because China and India weren't on board.
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