Instead of trying to be fair to other people's opinions or linking to things people have said I think I'll do a poll. I'd love to know your predictions.
Global warming escalates uncontrollably in next 50 years?
Nuclear war over remaining oil stocks (see Iran, China etc.)
A disease of some kind significantly depletes the global population in the next 50 years
Some responses to Lovelock's predictions, tick as many as you like
Please comment, particularly if my choices don't capture your views very well.