Every couple of years, climate scientists cautiously specify a range including scenarios 1 and 2. The GOP says, "That's crazy scaremongering!" Then when the data come in it turns out we're in scenario 3.
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RT @xkcdComic
Scenario 4 https://xkcd.com/2289/ https://m.xkcd.com/2289/
https://twitter.com/xkcdComic/status/1246492945567453184