Not to mention that if the problems created by climate change start costing lives and infrastructure, our ability to implement solutions dwindle as well. We need to have done the research and start on fixing the issues before populations and research facilities have been decimated or destroyed. The only reason we have the ability now to even think about colonizing mars and developing a new and unproven energy generation method is because we have such large societies where these things can eke out of the cracks.