Europe’s first solar-powered railway tunnel will be opened on Monday in Antwerp.
The 2.1 mile-long tunnel will form part of the Paris-Amsterdam high speed rail link.
Electricity generated from the 50,000 solar panels will provide the electricity used to power the 186 mph trains as they pass underneath.
The panels, which are being built by a Belgian solar power company, Enfinity, will £12.6 million.
They will cover an area equivalent to eight football pitches and apart from the trains, will also power for Antwerp.
The panels will generate an estimate 3,300 MWh of electricity per year, equivalent to the average annual electricity consumption of approximately 950 families.
It is estimated that it will save 47.3 million kilograms of CO2 emissions over two decades.
Solar energy is seen as a method of reducing the rail industry’s carbon footprint.
In the United States ac campaign has been launched for a “sun-powered bullet train” travelling at 200mph between Tucson and Phoenix, Arizona.
Meanwhile in Italy, the EU has been funding a train with solar panels on the roof, which are used to provide electricity for the carriages’ air conditioning system.
The French have also been looking at the technology using solar panels to power the lighting and air conditioning on a train in Poitou Charentes.