The document discusses plans for the Fehmarn Belt Fixed Link, which will connect Denmark and Germany with an immersed tunnel. It will be the world's longest immersed tunnel at over 18 km long. The tunnel aims to bring Scandinavia closer to Europe and shorten travel times between major cities like Copenhagen and Hamburg. It is expected to be completed in 2021 and significantly increase both passenger and freight rail traffic between Scandinavia and Central Europe. The region surrounding the link is also expected to see economic growth in industries like tourism, logistics, and renewable energy.