“Thirty years ago there was typically about eight million square kilometres of ice left in the Arctic in the summer, and by 2007 that had halved, it had gone down to about four million, and this year it has gone down below that. Over that 1% of the Earth’s surface you are replacing a bright surface, which reflects nearly all of the sun’s radiation falling on it, with a dark surface which absorbs nearly all. The difference, the extra radiation that’s absorbed is, from our calculations, the equivalent of about 20 years of additional CO2 being added by man.”
— Prof. Peter Wadhams, Cambridge University
(via secularhumanist2)
