With the introduction of H2 cars, will the new pollution be H2O vapor?

Question

If there were presently the same number of H2 cars as there are fossil fuel cars wouldn't too much water vapor in our atmosphere cause destructive weather patterns and floods? Just wondering if computer studies have been done.

Answer 1

If the use of Carbon fuels is causing global warming then stopping the use of carbon fuels will cause global cooling. Glaciers will advance.

The water vapour will turn to ice. Ice that will not melt for a thousand years.

I predict a return to the dark ages.

Answer 2

Where has this nonsense question been coming from? People keep asking it, and it's obvious that with a planetary surface that is over 70% water, NO number of cars can possibly make a difference!

Answer 3

well the thing is where will you get the H2? water right but then where will you get the energy needed to split water? probobly fossil fuels at our current level of technology. until someone comes up with cheap way of getting hydrogen we are DOOMED T_T

Answer 4

the amount of water on the earth now is the same amount that was here when the earth was created.  its the water cycle.  it evaporates and comes back as rain.  so i dont think that that would have any kind of effect on the amount of rain or whatever.

Answer 5

No, gasoline powered cars also produce water vapor and at rates only slightly less than a hydrogen powered car would.