1. Global CO2 Emissions in 2019 Data & Statistics—IEAhttps://www.iea.org/data-and-statistics?country=WORLD&fuel=Energy supply&indicator=Total primary energy supply (TPES) by source
2. Electricity Generation and Power Sector CO2 Emissions in Advanced Economies, 1971–2019—Charts—Data & Statistics—IEAhttps://www.iea.org/data-and-statistics/charts/electricity-generation-and-power-sector-co2-emissions-in-advanced-economies-1971-2019
3. Global Hydropower Market “to See Compound Growth Rate of 2.4% Until 2030”—Energy Live Newshttps://www.energylivenews.com/2019/10/29/global-hydropower-market-to-see-compound-growth-rate-of-2-4-until-2030/
4. What Are the Most Used Renewable Energy Sources in the World?https://www.power-technology.com/features/featurethe-worlds-most-used-renewable-power-sources-4160168/
5. Power—Renewables 2019—Analysis—IEAhttps://www.iea.org/reports/renewables-2019/power