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Marine environment

The Tunnel’s Climate Footprint

It is not possible to construct a tunnel without emitting CO2. However, the Fehmarnbelt Tunnel is an investment in a shortcut to Europe with a lifespan of at least 120 years, and we are making significant and targeted efforts to reduce emissions.

Overall, the CO2 equivalent emissions for the construction of the Fehmarn Belt Tunnel are calculated at 2.25 million tonnes. The climate impact is mainly from steel and cement production for the tunnel itself, as well as the use of transport vehicles and machinery. 

However, we are making significant and targeted efforts to reduce emissions, such as requiring the use of renewable energy in major contracts or using materials with lower climate impact. This applies both during construction and subsequent operation. 

Additionally, contractors are rewarded for implementing particularly energy-saving measures. 

The Fehmarnbelt Tunnel is built to last at least 120 years and is an investment in a more efficient shortcut to Europe with an electrified railway. This saves traffic a detour of 160 kilometres over the Great Belt compared to today. 

The tunnel is a significant contribution to a more sustainable transport corridor by shifting freight from lorries to electric trains and offering an alternative to air travel. 

Examples of measures to reduce climate impact: 

  • Use of heat pumps in the Tunnel Village and the factory 

  • Use of battery technology for offshore excavators 

  • Use of less concrete and steel through project optimisation 

  • Recycling construction materials and water from the factory