Scientists Say Evidence for Man-Made Climate Change Has Reached a 'Gold Standard' of Certainty. The implications are that there is only a one-in-a-million chance that the pattern of atmospheric heating is not the result of human activity.

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Scientists Say Evidence for Man-Made Climate Change Has Reached a 'Gold Standard' of Certainty. The implications are that there is only a one-in-a-million chance that the pattern of atmospheric heating is not the result of human activity.