Companies with the Most Fossil Fuel and Cement CO2 Emissions

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Key Takeaways

Half of the world’s fossil fuel and cement carbon dioxide emissions in 2023 came from just 36 entities, according to a report by the Carbon Majors Project
If Saudi Aramco were a country, it would be the fourth-largest polluter in the world, after China, the U.S., and India.
Five publicly traded oil companies—ExxonMobil, Chevron, Shell, TotalEnergies, and BP—together accounted for 5% of global carbon dioxide emissions from fossil fuels.

Chinese Companies Dominate the List

This graphic is based on , a database of historical production data from 180 of the world’s largest oil, gas, coal, and cement producers representing 169 active and 11 inactive entities.

In 2023, the top 20 highest carbon-producing entities were responsible for 17.5 gigatonnes of carbon dioxide equivalent (GtCO₂e) in emissions, accounting for 40.8% of global fossil fuel and cement CO₂ emissions. The list is largely dominated by state-owned companies, with 16 of the top 20 being state-controlled. Notably, eight Chinese entities contributed to 17.3% of global fossil fuel and cement CO₂ emissions in 2023.

Coal continued to be the largest source of emissions in 2023, representing 41.1% of emissions in the database and continuing a steady upward trend since 2016. Coal emissions grew by 1.9% (258 megatonnes of carbon dioxide equivalent – MtCO₂e) from 2022, while cement saw the largest relative increase at 6.5% (82 MtCO₂e), driven by expanding production.

In contrast, natural gas emissions fell by 3.7% (164 MtCO₂e), and oil emissions remained stable with only a slight increase of 0.3% (73 MtCO₂e).

Learn More on the Voronoi App

To learn more about this topic, check out this that shows greenhouse gas emissions by sector in 2023, according to data was compiled by the United Nations. The power sector remains the largest emissions contributor.