I discussed a suitable understanding of ‘global warming’ yesterday, settling on ‘catastrophic man-made global warming’. By extraordinary chance one of the cheaper (in fact free) tabloids this morning was talking about how global warming could cause a meltdown of the Arctic, flooding London. That’s what I call catastrophic! I live close to the Thames, and hardly relish the thought of having to leave the basement for the upper floors, and travelling to Tesco’s by boat, within my lifetime or my children’s.
But let’s move on to reasons for believing in this catastrophe. Clearly the catastrophic flooding will be caused by higher temperatures. But how high do the temperatures have to get, and how will this be caused? What is the Fermi explanation?