Shortly after the New Year, I was fired from Oak Ridge National Laboratory after urging fellow scientists to take action on climate change. At the American Geophysical Union meeting in December, just before speakers took the stage for a plenary session, my fellow climate scientist Peter Kalmus and I unfurled a banner that read “Out of the lab & into the streets.” In the few seconds before the banner was ripped from our hands, we implored our colleagues to use their leverage as scientists to wake the public up to the dying planet. Soon after this brief action, the A.G.U.,...