I can not vouch for the numbers herein; but I find them to not be out of line. Are we running headlong into becoming totally irrelevant as a species? Can we continue with this ‘quickening’ self abuse? In the game of D&D there is the ability to put the etch-a-sketch above ones head and shake it. (see Hecatoncheire in not only gaming but also Greek legend).
I have every hope and desire that we will survive ourselves, I just hope the cost of doing so will not be so high that what comes out on the other end will still be recognizable.