1. The Climate System: An Overview;Ahlonsou,2018
2. Climatehttps://public.wmo.int/en/our-mandate/climate
3. Climate Change 2021, the Physical Science Basis,2021
4. CO2 Emissionshttps://www.iea.org/reports/global-energy-review-2021/co2-emissions
5. BP Energy Outlook 2020,2020