Scotsman: Storms lash Britain again, bringing flooding, power cuts, and general misery to thousands. Across the Atlantic, the eastern United States and Canada are weighed down by huge snowfalls and temperatures more akin to the Arctic. In the southern hemisphere, Australia has just experienced the hottest year on record, sparking ferocious forest fires. Some may see this coincidence of extreme events as just that, an unlucky happenstance. They, however, are increasingly in the minority. The evidence now argues...