While you folks in that other hemisphere were sleeping, I answered my own questions -
The hydrogen is burned to power an electric motor in the experimental Honda.

While hydrogen itself is a superclean fuel, extracting it from hydrocarbons, the most common production method, can create more pollution than it saves. And wringing it from water requires a lot of electricity, another source of pollution.

So, you use a bunch of electricity to create hydrogen, then burn it to power an electric motor? Sounds like what we really need is for someone to make a quantum leap in the efficiency of petrol motors. It would be a far more effective use of resources to continue wringing more fuel from atomized gasoline than to keep chasing the pipe dream of alternate fuels. I know some are viable, but until we can overcome the conspiracy between the government and the oil companies, it's just a waste of tax dollars.

No flaming please, just me expressing my opinion.