1. Corinne Le Quéré, Robbie M. Andrew, Pierre Friedlingstein, Stephen Sitch, Judith Hauck, Julia Pongratz, et al. Global carbon budget; 2018.
2. IPCC. Special report: global warming of 1.5 °C; 2018.
3. World Resources Institute. CAIT climate data explorer (historical emissions); 2017.
4. International Energy Agency. World energy outlook 2018. Paris, France: International Energy Agency; 2018.
5. International Energy Agency. Tracking industrial energy efficiency and CO2 emissions. Paris, France; 2007.