Hydrogen vehicles were supposed to be a clean, practical way of powering the cars of the future. Theoretically, the idea seems great: Hydrogen fuel cell electric vehicles, or FCEVs, generate ...

And at the announcement venue, the V8 hydrogen engine shown above, which was developed by Yamaha for Toyota, was unveiled to the public. The unit is based on the 5.0-liter engine in the Lexus RC F ...