Is the warming unprecedented? Probably not. There is abundant historical and proxy evidence for both hotter and cooler periods in human history. Is it our fault? Again, maybe. The correlation of increasing warmth with increasing carbon dioxide concentrations is particularly weak; that with solar energy and with ocean movements is much stronger.
Don AitkinWhy is there such insistence that AGW has occurred and needs drastic solutions? This is a puzzle, but my short answer is that the IPCC has been built on the AGW proposition and of course keeps plugging it, whatever the data say. The IPCC has considerable clout. Most people shy off inspecting the evidence because it looks like science and must therefore be hard. The media have been captured by AGW (it makes for great stories), the environmental movement and the Greens love it, and business is reluctant to get involved.
Don AitkinWhatever politicians, activists and manipulators propose, it is the phlegmatic, indifferent, ingrained electorate which disposes.
Don Aitkin