Just thinking. If fish could breath the O in H2O and release the H2 then we would have our energy problem solved as fuel for the hydrogen car, so I understand that. I hope I'm not sounding too stupid. But the underwater plant is doing this by splitting off oxygen from the water H2O. Looks like a great source of fuel if you cold get enough of it. This gets back to my question of a Parrot Plant that is half in and half out of water. If the part of the plant underwater is somewhat sourcing oxygen from the water into dissolved oxy. (splitting H2O) while the part of the plant above water is converting carbon dioxide to oxygen, then it looks like there are two different operations going on, one in the bottom half and one in the top half of the plant to get the same results, free oxygen. Also, if you take 2 parts H and one part O and put them into a test tube would you get water, or does it take an electric process like in a hydrogen car that gets the waste product of water. Just asking. Should have taken chemistry.