Spiegel: SPIEGEL: Mr. Schellnhuber, Russia is burning and floods have inundated Pakistan. Are such extreme weather phenomena increasing because of gradual climate change? Hans Joachim Schellnhuber: Such events certainly do correspond to what we expect from a warmer world. We have seen record average global temperatures for more than a year now, and that increases the likelihood of regional heat waves like the one in western Russia at the moment. Besides, our climate models show that the South …