Study: European Ferries Emit More Sulphur Than All City Cars

Should ferries electrify immediately or is gradual transition the only realistic path forward?
Study: European Ferries Emit More Sulphur Than All City Cars
Above: A freight ferry destined for the U.K. leaves Dublin Port on Jan. 31, 2024. Image credit: Brian Lawless/PA Images/Getty Images

The Facts

  • A study by the NGO Transport & Environment, which examined 1,043 ferries across Europe's 100 busiest ferry ports, has found that ferries in European port cities such as Barcelona, Dublin and Naples emit more sulphur oxides than all cars in those cities combined.
  • In 2023, European ferries analyzed by Transport & Environment emitted 13.4 million tonnes of CO2, equivalent to 6.6 million cars over a year. Barcelona was identified as the European port responsible for the highest ferry CO2 emissions.
  • Dublin is currently the most polluted ferry port in Europe in terms of air pollution, followed by Las Palmas and Holyhead. This ranking is expected to change in 2027, when new emission control areas limiting air pollution from maritime fuels come into place in the North-East Atlantic.

Sources Split


The Spin


Narrative A

Reports focused solely on high emissions compared to inner-city cars generate a false comparison for transport designed to operate long-distance between multiple locations. Ferries reduce prices, tolls and human fatigue, making them a net benefit to society even if more progress on their environmental impacts can be made.

Narrative B

Cruise ships in Europe emit more sulphur oxides than one billion cars, yet the industry keeps expanding, with 360 ships carrying record rates of passengers. Though new fuels take massive investment and infrastructure that doesn't yet exist at scale, making efficiency improvements and gradual transitions is the only realistic path forward — it is clear that change is desperately needed.


Metaculus Prediction


The Controversies



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© 2026 Improve the News Foundation.

All rights reserved.

Version 7.18.3