52 gigatons of GHGs must be reduced to zero by 2050 to limit warming to 1.5°C, but without additional measures, an increase of 3.2°C is projected by 2100 (Sutton, Lotsch & Prasann, 2024).
Sutton, William R., Alexander Lotsch, & Ashesh Prasann. 2024. Recipe for a Livable Planet: Achieving Net Zero Emissions in the Agrifood System. Agriculture and Food Series. Washington, DC: Banco Mundial. doi:10.1596/978-1-4648-2093-9. License: Creative Commons Attribution CC BY 3.0 IGO
IPCC (Intergovernmental Panel on Climate Change). 2023. Climate Change 2023: Synthesis Report; Contribution of Working Groups I, II and III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change, edited by H. Lee and J. Romero. Geneva: IPCC. https://doi.org/10.59327/IPCC/AR6-9789291691647.