Joint Technical Note by the UNFCCC And UNEP: The Reasons Behind the Differences in Projected Emissions Totals for 2030 Between the UNFCCC NDC Synthesis Report and the UNEP Emissions Gap Report 2021

The UNFCCC NDC Synthesis Report (published on 17 September, updated on 25 October 2021) and the UNEP Emissions Gap Report (published on 26 October 2021) present projections of global GHG emissions to 2030, and to some extent beyond 2030. The projected trajectories of global GHG emissions somewhat differ in the two reports: for example, for global GHG emissions in 2030 the difference is about 6-7 Gt CO2 equivalent. Overall, the range of UNEP GHG trajectories is lower than the range of UNFCCC trajectories.