By Patrick Appel
Ryan Avent warns:

I don’t think warming will mean the end of humanity, but it will be serious enough that major geo-political change will take place, leading to all manner of unpredictable, and often catastrophic, outcomes. And as we approach critical thresholds, I think you’ll begin to see some scientists and activists grow radicalized by our inaction. When people see that the political leaders aren’t going to take the necessary steps, they’re going to start blowing up coal plants. I’m not kidding.

(Hat tip: John Schwenkler)