IEA (2021), Annual average clean energy investment by technology in the Announced Pledges and Net Zero Scenarios, 2016-2030, IEA, Paris https://www.iea.org/data-and-statistics/charts/annual-average-clean-energy-investment-by-technology-in-the-announced-pledges-and-net-zero-scenarios-2016-2030, Licence: CC BY 4.0