Except for every 4 H2 molecules you get a CO2 that's generally released to the atmosphere: http://en.wikipedia.org/wiki/Hydrogen_production http://en.wikipedia.

Except for every 4 H2 molecules you get a CO2 that's generally released to the atmosphere: http://en.wikipedia.org/wiki/Hydrogen_production http://en.wikipedia.org/wiki/Hydrogen_production