>"Musk's dream of a Mars colony seems easier than trying to co-ordinate that 1.5C global warming plan or prevent myriad of other apocalypse scenarios."
In the best case scenario, we go to mars and do the same thing again. That's disregarding all the actual problems it would take to get there, and live there. And also disregarding all the problems we actually HAVE to solve about living here (and living, in general).