So would you rather wait a few decades until we actually see people lose their jobs, their livelihoods, and see people dying before we do anything at all? At that point, the problem is vastly more difficult and expensive to fit. Global warming models are in constant revision. Because hurricane activity and global warming isn't as strongly correlated as once believed, there still isn't much dispute that the global temperatures are going to rise very significantly in the next century. The temperature rises alone will be destructive to the world economy and to many human beings.