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Germany And Denmark Are Building The World's Longest Underground Tunnel

Germany and Denmark could be connected by the worlds longest underground tunnel as soon as 2029, with construction having already commenced in 2020. The tunnel spans a total length of over 18km, and will shorten the estimated travel times between the two countries from 4.5 hours down to 2.5 hours. This halves the average journey time.

Image Credits: FEMERN A/S

It will sit 40 meters underneath the Baltic Sea, and will be the longest underground tunnel ever built as of writing. The tunnel is set to cost around €10 billion, with the EU having already invested €1.1 billion to help with its construction.

However, the tunnel is not only for cars, it will also serve as a railway line, so travelers will have a variety of different transportation options. Train links will even extend as far as Sweden, Norway and Finland. It is hoped that the shorter travelling times will help to better connect the two countries and help to reduce travel related emissions.

Image Credits: FEMERN A/S

It is also thought that the tunnel between Germany and Denmark will help to relieve congestion on both rail and road networks, which will help to save time, fuel and energy. In addition, the construction company responsible will also be building the tunnel as sustainably as possible with nature in mind, including making the tunnel suitable for green fuels of the future.

Germany also recently launched the first ever hydrogen-powered train in an effort to slash carbon emissions and continue on an upwards trajectory to help to meet the country's climate goals. The new fleet consists of twenty-seven new hydrogen-powered trains, and will travel across several different locations.

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