Germany’s Deutsche Welle (DW) here presents a commentary by Hans Joachim Schellnhuber, the director of German ultra-alarmist Potsdam Institute for Climate Impact Research. Professor Schellnhuber fears that the planet could warm even as much as 12°C if man does not act quickly to totally eliminate greenhouse gases.

Source: Potsdam PIK Climate Director Says We Will Have To Go Back To Mud Huts By 2040