A boy plays on rebar being used to build a new sea wall to replace one that failed during last year’s king tide in Betio, a town on the island of South Tarawa in Kiribati, whose fate in the face of climate change is so precarious that the government is effectively planning its own demise. Photograph: Josh Haner/New York Times

Planet Catastrophe is not always a good headspace to occupy for long. So when Massachusetts Institute of Technology atmospheric chemist Susan Solomon(...)