Figures have been rounded. Includes emissions from tankers, dry bulk and general cargo, container, and "others", which includes vehicles and roll-on/roll-off ships, passenger ships, offshore ships and service and miscellaneous ships.
Citation formats
Global merchant fleet COâ‚‚ emissions 2019-2023, by month
Carbon dioxide emissions from the world's merchant fleet were estimated at **** million metric tons (MtCOâ‚‚) in August 2023. This was the largest monthly volume of COâ‚‚ emitted by the global shipping fleet between January 2019 and September 2023. February recorded the lowest emissions in each year during this period.
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OECD. (July 23, 2025). Monthly carbon dioxide emissions of the world's maritime fleet from 2019 to 2023 (in million tons) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 28, 2026, from /statistics/1404750/monthly-shipping-emissions-worldwide/
OECD. "Monthly carbon dioxide emissions of the world's maritime fleet from 2019 to 2023 (in million tons)." Chart. July 23, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 28, 2026. /statistics/1404750/monthly-shipping-emissions-worldwide/
OECD. (2025). Monthly carbon dioxide emissions of the world's maritime fleet from 2019 to 2023 (in million tons). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 28, 2026. /statistics/1404750/monthly-shipping-emissions-worldwide/
OECD. "Monthly Carbon Dioxide Emissions of The World's Maritime Fleet from 2019 to 2023 (in Million Tons)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 23 Jul 2025, /statistics/1404750/monthly-shipping-emissions-worldwide/
OECD, Monthly carbon dioxide emissions of the world's maritime fleet from 2019 to 2023 (in million tons) ÌÇÐÄÆƽâ°æ, /statistics/1404750/monthly-shipping-emissions-worldwide/ (last visited July 28, 2026)
Monthly carbon dioxide emissions of the world's maritime fleet from 2019 to 2023 (in million tons) [Graph], OECD, July 23, 2025. [Online]. Available: /statistics/1404750/monthly-shipping-emissions-worldwide/
