Target Atmospheric CO2: Where Should Humanity Aim?

„If humanity wishes to preserve a planet similar to that on which civilization developed and to which life on Earth is adapted, paleoclimate evidence and ongoing climate change suggest that CO2 will need to be reduced from its current 385 ppm to at most 350 ppm.“

James Hansen & al. gave this clear statemant in the abstract of their landmark study. The study is available for Download here. Formal citation: Hansen, James & Sato, Makiko & Kharecha, Pushker & Beerling, David & Berner, Robert & Masson-Delmotte, Valerie & Pagani, Mark & Raymo, Maureen & L. Royer, Dana & Zachos, J.C.. (2008). Target Atmospheric CO2: Where should Humanity Aim?. The Open Atmospheric Science Journal. 2. 10.2174/1874282300802010217.

See also Opinion: A voice in the wilderness by Kate Sheppard on James Hansen’s testimony on climate change before the House Select Committee for Energy Independence and Climate Change.