Med drivhusgasser i atmosfæren er Jordens gennemsnitstemperatur på 14&nbsp;°C. Uden drivhusgasser i atmosfæren antages at Jordens gennemsnitstemperatur ville være −18&nbsp;°C.<ref>{{cite web |url=https://eesc.columbia.edu/courses/ees/climate/lectures/radiation/ |title=Solar Radiation and the Earth's Energy Balance |3=publisher |access-date=31. marts 2020 |archive-date=15. november 2019 |archive-url=https://web.archive.org/web/20191115150338/https://eesc.columbia.edu/courses/ees/climate/lectures/radiation/ |url-status=live }}</ref><ref name="IPCC4_ch01">{{Cite web |url=https://wg1.ipcc.ch/publications/wg1-ar4/ar4-wg1-chapter1.pdf |title=Intergovernmental Panel on Climate Change Fourth Assessment Report. Chapter 1, page 97 |access-date=31. marts 2020 |archive-date=19. december 2019 |archive-url=https://web.archive.org/web/20191219032146/https://wg1.ipcc.ch/publications/wg1-ar4/ar4-wg1-chapter1.pdf |url-status=live }}</ref><!-- http://www.ipcc.ch/pdf/assessment-report/ar4/wg1/ar4-wg1-chapter1.pdf var negativ Mar31-2020 -->
Jura Politik Samfund Fysik Traktater Miljø_og_samfund Folkeret