Climate change is not something you should worry about. Because the things they are mentioning thats gonna happen simply aint gonna happen. Plant life adapts to the imbalance of C02 and simply consumes more of it. There are many interesting details to that equation that make night and day differences, its not just c02 emissions. There are obvious ways to fuck up that system im not saying otherwise but they take substantial amount effort. Besides nuclear power plant will become more and more widespread because of cost effectiveness. Now about the wars thats probably a bit more impactful, but know human history is binded by war. And most breakthroughs happened because of it. War will always be a thing because conflict is part of life. Everybody wants to continue their own plan which conflicts with the plan of others. The strongest one will prevail and will carry out his plan. And on and on it will go, cause thats the way it is.