Professor Hans Joachim Schellnhuber (leading climate scientist) when asked at a 2011 conference in Melbourne about the difference between a 2°C world and a 4°C world, replied: “Human civilization” (Ian Dunlop and David Spratt, “Disaster Alley climate change conflict & risk”, Breakthrough, 2017: https://uploads.guim.co.uk/2017/06/20/ACFrOgDkCYAvFeJ9d4YxhOlZiOHNkTOnWbkhlY_dX8kl_O3ChbGcEmWsbUNrOnJUwE4SNWFvzB7RM6w4GsF0pDwdnREIip-k5J-03TQc0Op4FWrsNcZpjXAuy7NNJ_Y=.pdf ).
Hans Joachim Schellnhuber ( founding director of the Potsdam Institute for Climate Impact Research, Germany and key adviser to Angela Merkel in the design of Germany's transition to a low-carbon economy) (2015): “In the world of Google you can raise any myth and you can raise any lie. If you go to the internet then I will be accused or applauded for asking to reduce the world population to one billion. 'Here is what I really said. It was a scientific conference, preceding the infamous Copenhagen conference in 2009, and actually I talked about the carrying capacity of the Earth, which is an interesting issue. What I said is, if global warming is not in any way mitigated, and we go into a six or eight degrees warmer world, then our planet will probably only be able to support a billion people” (Hans Joachim “John” Schellnhuber quoted in Rosanna Ryan, “Meet John Schellnhuber: climatologist to Pope Francis”, ABC Radio National Late Night Live, 25 September 2015: https://www.abc.net.au/radionational/programs/latenightlive/meet-john-schellnhuber-climatologist-to-pope-francis/6799686 ).