IEA (2021), Global thermal energy intensity and fuel consumption of clinker production in the Net Zero Scenario, 2015-2030, IEA, Paris https://www.iea.org/data-and-statistics/charts/global-thermal-energy-intensity-and-fuel-consumption-of-clinker-production-in-the-net-zero-scenario-2015-2030, Licence: CC BY 4.0