carbon countdown

It is urgent to act, and turn carbon neutral. The Synthesis Report (SYR) of the IPCC Fifth Assessment Report (AR5) shows page 63 and 64 that limiting total human-induced warming to less than 2°C would  require  total new  CO2  emissions to  be  limited  leaving in 2014 about 800 GtCO2  to be consistent  with  this  temperature  goal, representing 21 years of today emissions.