IEA (2023), Comparison of CO2 emissions reductions in 2050 relative to base year by technology maturity in the Net Zero Scenario, 2021, IEA, Paris https://www.iea.org/data-and-statistics/charts/comparison-of-co2-emissions-reductions-in-2050-relative-to-base-year-by-technology-maturity-in-the-net-zero-scenario-2021, Licence: CC BY 4.0