[bnelson44]

Hydrogen is one of the most expensive ways of powering a car. See:

http://media.popularmechanics.com/documents/Fuel_of_the_Future-e852.pdf

[umgud]

Hydrogen is one of the most expensive ways of powering a car. See:

Even if it weren't expensive, it has other problems such as the safety and size of tanks needed for vehicles. That said, however, hydrogen could be produced cheaply if we got over our taboos of nuke plants.

[edwin hubble]

"Hydrogen is one of the most expensive ways of powering a car"

The physics of the electrolysis of water cannot be overcome.

But the economics of large-scale production of hydrogen might be. In March of this year GE announced a price-breakthrough in electrolysis of water into hydrogen.

http://www.technologyreview.com/read_article.aspx?id=16523&ch=biztech

Prediction is for a hydrogen cost equivalent to $3/gal gasoline

[bIlluminati]

Water don't burn.

Was a car, the Stanley Steamer, that heated water into steam. But it used an external combustion engine and weighed a lot.