Netherlands became the first in the world to run for 100% on wind energy, giving travellers the option of travelling without CO2 emissions. In total, NS consumes around 1.2 TWh of electricity to power its trains.
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https://www.businessinsider.com/wind-power-trains-in-netherlands-2017-6
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https://www.businessinsider.com/wind-power-trains-in-netherlands-2017-6