Ships registered under the Liberia flag produced 116 million metric tons of carbon dioxide (MtCO₂) in 2022. This was the highest emissions among the world's shipping flag states that year. Since 2012, CO₂ emissions from ships registered under the Liberia flag have increased by more than 35 percent. In total, the 10 most polluting flag states emitted almost 600 MtCO₂ in 2022.
Carbon dioxide emissions from ships registered under select major flag states worldwide in 2022
(in million metric tons)
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Carbon dioxide emissions from ships registered under select major flag states worldwide in 2022
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Carbon dioxide emissions from vessels’ main and auxiliary engines, calculated based on bunker fuel from the Automatic Identification System. Figures have been rounded.
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UNCTAD. (September 27, 2023). Carbon dioxide emissions from ships registered under select major flag states worldwide in 2022 (in million metric tons) [Graph]. In Statista. Retrieved May 05, 2025, from https://www.statista.com/statistics/1487730/shipping-emissions-worldwide-flag-state/
UNCTAD. "Carbon dioxide emissions from ships registered under select major flag states worldwide in 2022 (in million metric tons)." Chart. September 27, 2023. Statista. Accessed May 05, 2025. https://www.statista.com/statistics/1487730/shipping-emissions-worldwide-flag-state/
UNCTAD. (2023). Carbon dioxide emissions from ships registered under select major flag states worldwide in 2022 (in million metric tons). Statista. Statista Inc.. Accessed: May 05, 2025. https://www.statista.com/statistics/1487730/shipping-emissions-worldwide-flag-state/
UNCTAD. "Carbon Dioxide Emissions from Ships Registered under Select Major Flag States Worldwide in 2022 (in Million Metric Tons)." Statista, Statista Inc., 27 Sep 2023, https://www.statista.com/statistics/1487730/shipping-emissions-worldwide-flag-state/
UNCTAD, Carbon dioxide emissions from ships registered under select major flag states worldwide in 2022 (in million metric tons) Statista, https://www.statista.com/statistics/1487730/shipping-emissions-worldwide-flag-state/ (last visited May 05, 2025)
Carbon dioxide emissions from ships registered under select major flag states worldwide in 2022 (in million metric tons) [Graph], UNCTAD, September 27, 2023. [Online]. Available: https://www.statista.com/statistics/1487730/shipping-emissions-worldwide-flag-state/
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