Published 12/15/2025
The green shipping corridor between Stockholm and Turku is one of only a few in the world that has gone from ambition to reality. This is evident from the new Annual Progress Report on Green Shipping Corridors 2025, which maps the development of the world's green shipping corridors.
Out of a total of 84 global initiatives, only four corridors have so far reached the so-called realization stage, where emission-reducing measures are now being implemented in regular traffic. Two of these are in the Baltic Sea region – including the Stockholm–Turku route, which is identified as one of the most advanced internationally.
On the route between Stockholm and Turku, the shipping company Viking Line has significantly increased the use of biogas in regular traffic. The vessels Viking Glory and Viking Grace are now powered by 50 percent renewable fuel. The European biogas that Viking Line uses enables a hundred percent reduction in transport emissions compared to fossil natural gas. The corridor has thus gone from planning to actual emission reduction.
The report also shows that the majority of the world's green shipping corridors are still in their early stages. High costs for fossil-free fuels, uncertainty about regulations and a lack of business models mean that many initiatives have difficulty taking the next step. The success of the Stockholm-Turku corridor is therefore highlighted as a clear example of what is possible when business, ports and regulations pull in the same direction.
The report emphasizes that the experiences from the most mature corridors will be crucial for more routes to follow suit. Stockholm-Turku is particularly highlighted as an example of how EU policy instruments, cooperation between ports and shipping companies and access to renewable fuels can break the so-called "implementation wall" in the climate transition of shipping.
Link to the report (external link)