Portugal vs Taiwan: Maritime transport CO2 emissions (experimental)
Maritime transport CO2 emissions (experimental) over time
- Portugal
- Taiwan
How they compare
Taiwan currently reports 644,627 Tonnes against 599,981 Tonnes in Portugal, a difference of 44,646 Tonnes.
That makes Taiwan's figure about 1.1 times Portugal's.
Across all 7 years both countries report, Taiwan has been ahead every year.
Portugal ranks 35th and Taiwan ranks 33rd of 138 countries.
Taiwan has averaged higher in every one of the 2 decades both report.
Head to head by decade
| Decade | Portugal | Taiwan | Difference | Ahead |
|---|---|---|---|---|
| 2010s | 489,094 Tonnes | 911,451 Tonnes | 422,357 Tonnes | Taiwan |
| 2020s | 542,876 Tonnes | 822,590 Tonnes | 279,714 Tonnes | Taiwan |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher maritime transport co2 emissions, Portugal or Taiwan?
- Taiwan, at 644,627 Tonnes against 599,981 Tonnes in Portugal as of 2025.
- What is the difference in maritime transport co2 emissions between Portugal and Taiwan?
- 44,646 Tonnes, with Taiwan ahead.
- How many years of comparable data are there for Portugal and Taiwan?
- 7 years are reported by both, from 2019 to 2025.
- How do Portugal and Taiwan rank globally for maritime transport co2 emissions?
- Portugal ranks 35th and Taiwan ranks 33rd 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