 SSPs also incorporate the use of six other models such as GCAM4,IMAGE,MESSAGE-GLOBIOM,REMIND-MAgPIE.The combination of models and scenarios concluded that by 2050, annual CO2 emissions are in the range between 9 and 13 billion tons of CO2.All of the scenarios estimated that temperature will remain below 2.0 °C change with a 66% probability of success.