World Climate Report
"..Gallup observes:
The shift in these views during the past two years has been particularly striking. The percentage who said global warming would pose a serious threat increased gradually from 1997 through 2008. The trend in these responses changed course last year, with slightly fewer Americans saying global warming would have a significant effect in their lifetimes. This year, that percentage is down even more, marking a six-point drop from 2009, and roughly similar to where it was nine years ago."
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