New Delhi, Oct. 11 -- All over the world, mean temperatures rose by a few degrees each year. The majority of tropical areas rapidly became uninhabitable, entire populations migrating north or south from temperatures of a hundred and thirty and a hundred and fortydegrees. Once-temperate areas became tropical, Europe and North America sweltered under continuous heat waves, temperatures rarely falling below a hundred degrees. Under the direction of the United Nations, the colonisation began of the Antarctic plateau, and of the northern borders of the Canadian and Russian continents."

Science fiction? Yes it is, a passage from J.G. Ballard's eerie novel from 1962, The Drowned World. Of course, this was before we had any inkling of climate chan...