Figure 2.7

Figure 2.7 | Historic anthropogenic CO2 emission and cumulative CO2 emissions (1850–2019) as well as remaining carbon budgets for limiting warming to 1.5°C and 2°C. Panel (a) shows historic annual anthropogenic CO2 emissions (GtCO2 yr –1) by fuel type and process. Panel (b) shows historic cumulative anthropogenic CO2 emissions for the periods 1850–1989, 1990–2009, and 2010–2019 as well as remaining future carbon budgets as of 1 January 2020 to limit warming to 1.5°C and 2°C at the 67th percentile of the transient climate response to cumulative CO2 emissions. The whiskers indicate a budget uncertainty of ±220 GtCO2-eq for each budget and the aggregate uncertainty range at one standard deviation for historical cumulative CO2 emissions, consistent with Working Group 1. Sources: Friedlingstein et al. (2020) and Canadell et al. (2021).