WHO DIES, MAN OR PLANT? THE SEQUAL

This time with text. Dont know what happened last time.
Almost all of the new technology to replace fossil fuels are pointing toward hydrogen conversion. To the best of my knowlege the principal is to pass water over a catylist and free a Hydrogen atom to burn. Then when the HO exits it immediately picks up a new Hydrogen atom from the air and becomes H2O again. This is all well and good but where does Hydrogen come from? How readily replaceable is it? When Hydrogen burns is it destroyed? If the tens of millions of fossil fuel burning engines convert to Hydrogen will there be enough? Where will the carbon compounds that are needed for photosynthisis come from to support plant life at its current level? Can man survive on lesser amounts or no Hydrogen? Could we talk without sounding like Minnie Mouse on speed?
Whos got an answer, or even a good guess? Its been too long since high school chemistry! I would even settle for a SWAG

THEOLOGY QUESTION

If you are a young, beautiful, Christian virgin and you are killed in a terrorist attack by some suicidal hairball, and become his slave in his hereafter, how do you get the heaven you were promised?
Does God and Allah have some sort of prisoner soul exchange? Where would God get the fodder for trade? Or is it, oops sorry about that,?