Montenegro vs Tonga: Maritime transport CO2 emissions (experimental)
Maritime transport CO2 emissions (experimental) over time
- Montenegro
- Tonga
How they compare
Tonga currently reports 3,844 Tonnes against 2,958 Tonnes in Montenegro, a difference of 886 Tonnes.
That makes Tonga's figure about 1.3 times Montenegro's.
The two have swapped places 2 times across 6 shared years of data; in 2019 it was Tonga ahead.
Montenegro ranks 126th and Tonga ranks 124th of 138 countries.
Across the 2 decades both report, Montenegro averaged higher in 1 and Tonga in 1.
Head to head by decade
| Decade | Montenegro | Tonga | Difference | Ahead |
|---|---|---|---|---|
| 2010s | 1,778 Tonnes | 3,161 Tonnes | 1,384 Tonnes | Tonga |
| 2020s | 7,998 Tonnes | 4,490 Tonnes | 3,509 Tonnes | Montenegro |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher maritime transport co2 emissions, Montenegro or Tonga?
- Tonga, at 3,844 Tonnes against 2,958 Tonnes in Montenegro as of 2025.
- What is the difference in maritime transport co2 emissions between Montenegro and Tonga?
- 886 Tonnes, with Tonga ahead.
- How many years of comparable data are there for Montenegro and Tonga?
- 6 years are reported by both, from 2019 to 2025.
- How do Montenegro and Tonga rank globally for maritime transport co2 emissions?
- Montenegro ranks 126th 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