We’re not talking about a hydrogen fuel cell — that’s for electric engines. But mixing hydrogen with oxygen (air) you’ll generate H2O as a byproduct. Tough to beat, huh? Have a look: https://youtu.be/3IPR50-soNA
Will hydrogen save the internal combustion engine
I really hope it will. Hydrogen and Oxygen are an explosive mixture, and it's success will depend on its safety. I am very interested in Hydrogen fuel cells (Ballard) with electric cars though.
Now if only Ballard could make some money. :)