IEA (2021), Changes in fossil fuel employment and energy areas with overlapping skills in the Announced Pledges Scenario to 2030, IEA, Paris https://www.iea.org/data-and-statistics/charts/changes-in-fossil-fuel-employment-and-energy-areas-with-overlapping-skills-in-the-announced-pledges-scenario-to-2030, Licence: CC BY 4.0