We have no reason to think that climate change is harmful if you look at the world as a whole. Most places in fact are better off being warmer than being colder. And historically the really bad times for the environment and for people have been the cold periods rather than the warm periods.
Man is made or unmade by himself. By the right choice he ascends. As a being of power intelligence and love and the lord of his own thoughts he holds the key to every situation.