Observed and projected global mean surface temperatures from 1900, for three IPCC scenarios and the 'Year 2000 constant concentration' pathway

If global greenhouse gas emissions would not be reduced, the 2°C target will be exceeded towards the middle of the 21st century. The horizontal 2°C target line takes into account warming of about 0.6 °C from pre-industrial to 1990. “Likely” ranges in average 2090-2099 warming for all six IPCC scenarios are shown on the right