Voice from London: Climate discussion is a polarized echo chamber

With climate change, the only stupid question is the one we don’t ask Recently, at a dinner, when climate cropped up, I asked, “How much global warming is due to man-made carbon and how much to the natural warming cycle?” You could have sliced the atmosphere with a guillotine. “I never, ever took you as a climate denier,” said one. “How could you ask such a question?” On another occasion recently, I was on a Michigan morning radio show talking about Russian and Chinese policy in the Arctic and said,…