[HangThemHigh]

I confess to not reading all of the article, but it sounds to me like the metal is consumed and is the source of the missing energy. If so, the waste water with dissolved metals will be far worse than the air pollution from burning oil.

[econjack]

...the waste water with dissolved metals will be far worse than the air pollution from burning oil.

It doesn't appear that's the case. I get the impression that the fuel cell is a closed-circuit technology. The water produced is the byproduct of burning hydrogen, which produces pure water and there is no contamination. I remember doing an experiment like this in my high school chemistry class. We put a spark in a test tube that we filled with hydrogen as a result of electrolysis. The spark ignited the hydrogen, which sounded almost like a dog's bark when it exploded. All that was left was a little water vapor in the test tube.