[robertpaulsen]

"which can be used to power a car producing only water,"

Sounds good, but where does all that water go? Could raise the oceans and wipe out coastlines! (You know that's coming -- they're printing up the protest signs right now).

[Izzy Dunne]

Sounds good, but where does all that water go?

Hmm. Since water is made up of hydrogen, why not just recycle it? Get the hydrogen from your own wastewater!
... where is that marketing department phone number? ...

< sarcasm OFF>