That train is a reality.
In March, Germany conducted successful tests of the world's first "Hydrail" -- a hydrogen powered, zero-emission train.
"The new train is 60% less noisy than a traditional diesel train, completely emission free," said Jens Sprotte of Alstom, the French producer of the train. "Its speed and the possibility to transport passengers match the performance of a diesel train."
"The only sound it gives off comes from the wheels and air resistance," Sprotte added.
Here's how the new technology works:
