Cook Islands vs Tonga: Maritime transport CO2 emissions (experimental)
Maritime transport CO2 emissions (experimental) over time
- Cook Islands
- Tonga
How they compare
Cook Islands currently reports 3,906 Tonnes against 3,844 Tonnes in Tonga, a difference of 62 Tonnes.
The two have swapped places 2 times across 6 shared years of data; in 2019 it was Cook Islands ahead.
Cook Islands ranks 123rd and Tonga ranks 124th of 138 countries.
Across the 2 decades both report, Cook Islands averaged higher in 1 and Tonga in 1.
Head to head by decade
| Decade | Cook Islands | Tonga | Difference | Ahead |
|---|---|---|---|---|
| 2010s | 6,226 Tonnes | 3,161 Tonnes | 3,065 Tonnes | Cook Islands |
| 2020s | 3,194 Tonnes | 4,490 Tonnes | 1,296 Tonnes | Tonga |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher maritime transport co2 emissions, Cook Islands or Tonga?
- Cook Islands, at 3,906 Tonnes against 3,844 Tonnes in Tonga as of 2025.
- What is the difference in maritime transport co2 emissions between Cook Islands and Tonga?
- 62 Tonnes, with Cook Islands ahead.
- How many years of comparable data are there for Cook Islands and Tonga?
- 6 years are reported by both, from 2019 to 2025.
- How do Cook Islands and Tonga rank globally for maritime transport co2 emissions?
- Cook Islands ranks 123rd and Tonga ranks 124th of 138 countries.
- Where does this data come from?
- Organisation for Economic Co-operation and Development, published as Maritime transport CO2 emissions (experimental). Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
This experimental dataset includes annual, quarterly, and monthly information on carbon dioxide (CO2) emissions from maritime transport based on ship-tracking information collected via Automatic Identification System (AIS) transponders, covering all large vessels (above 300 gross tonnage) around the world, accessed via the United Nations Global Platform, from 2019 onwards. The CO2 emissions are estimated by the OECD, based on a consistent methodology across countries and include emissions from both domestic and international voyages. The CO2 emissions are classified using the ship-type classification used by the International Maritime Organisation (IMO) distinguishing between 19 vessel categories such as bulk carriers, tankers, and cruise ships. The database provides a measure of CO2 emissions on a territory basis for domestic navigation, which is used for reporting in the UN Framework Convention on Climate Change (UNFCCC) inventories; and also on a residence basis, which is used to estimate the emissions of maritime transport (H50 in the International Standard Industrial Classification of All Economic Activities, or ISIC) in the SEEA Air Emission Accounts (AEAs). Seven components of these CO2 emissions measures can be selected from the ‘Vessel emissions ’ filter. In the tables, these are also shown with the letters A, B, C, D, E, F and G. The aggregate measures of CO2 emissions are calculated as: Domestic navigation = A + C International navigation (memo item) = D + G Air emissions accounts: maritime transport (ISIC H50) = A + B + D + E + F For residence based measures, the allocation of emissions to countries is based on the residence of the companies that operate the ships. More information can be found on the dataset webpage