There sure is a lot of talk about how "global warming" is about to destroy the planet! And how, if we don't stop driving our SUVs – and go back to living by candlelight – we'll all be dead within the next 20 years. (Just ask your children; that's what they probably already believe.) But I'd like to propose that there are much worse catastrophes we really should be worried about. Here is my list of the Top 8: