Methodology
To find the countries emitting the most CO2, 24/7 Wall St. reviewed Global Carbon Budget 2022 by Friedlingstein et al. (2022b) published at Earth System Science Data. The study estimates national emissions from fossil fuel combustion and oxidation and cement production and excludes emissions from bunker fuels (fuels used for international aviation and maritime transport). World totals, however, include emissions from bunker fuels. Estimates of historical emissions from the study were used to calculate the change in emissions.
To calculate emissions per capita, 24/7 Wall St. used population totals from the United Nations’ World Population Prospects 2022. These are estimates as of July 2021. Gross domestic product data came from the World Bank and figures are in current international dollars.
