Its only emissions are steam and condensed water.
The world’s first CO2-emission-free train powered through hydrogen was unveiled this week in Germany.
The train's energy comes from combining hydrogen stored in tanks on the train with oxygen in the air. The energy is then stored in lithium-ion batteries.
The train's only emissions are steam and condensed water.
The train also has lower noise levels than diesel trains, emitting only the sound of its wheels on the track and any sounds from air resistance at even its highest speed of 140 kilometers per hour (about 87 miles per hour).
The train has the ability to travel up to 800 kilometers (497 miles) and carry up to 300 passengers; it's the world’s first hydrogen passenger train that can regularly operate long journeys.
The company is testing the trains throughout the next year, and plans to start carrying passengers in Germany in late 2017 or early 2018.
Though the price of the trains is yet to be announced, Alstom anticipates its operating costs will be similar to the operating costs of diesel units.
Talia Avakian is a digital reporter at Travel + Leisure. Follow her on Twitter at @TaliaAvak.