Global warming: Does it take MORE energy to create hydrogen than PROVIDED in hydrogen fuel cell cars?

The round trip is a net loss isn’t it? We use electricity to convert H2O into H and O.

Then in a hydrogen fuel cell car, we RE-convert the H and O back into H2O again.

So it is a round trip.

But since every mechanical device LOSES energy through friction and heat and waste, the round trip from H2O to H O and back to H2O LOSES energy.

Isn’t this right? So how will a hydrogen economy run the country or replace oil-burning cars?

Originally posted 2008-12-21 21:28:55.

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Bob December 25, 2008 at 1:03 am: The processes involved are more efficient than gasoline engine.
But the real purpose is to limit CO2 to fight global warming, anyway. It’s a system which involves also building alternative electric power plants; nuclear, solar, and wind.