OSLO: A record-breaking string of hot years since 2000 is almost certainly a sign of man-made global warming, with vanishingly small chances that it was caused by random, natural swings, a study showed on Monday.
Last year was the hottest since records began in the 19th century in a trend that almost all scientists blame on greenhouse gases from burning of fossil fuels, stoking heat waves, droughts, downpours and rising sea levels.