It is already almost uninhabitable and has been for a long time. Nevertheless ~10M people live there. Technology is solving this, either the root cause or the symptoms
Not sure what you mean “the outside”. Only indoors are air-conditioned (using electricity). And in the UAE, right now, electricity generation is slowly being switched over solar energy (away from natural gas), which is clean / renewable / sustainable. (https://www.greentechmedia.com/articles/read/worlds-largest-...)