If there was a mass production of hydrogen fuel cell engines would the water emitions effect the environment?

Question

The only emitions produced by hydrogen fuel cell engines is h2o. What would a sudden increase of moisture in the atmosphere do to the environment? Would drought be a thing of the past?

Answer 1

The effect is trivial.  The effect of the burning of all fossil fuels (and these contain hydrogen) is to add about 1/10,000 to water precipitation from the atmosphere.  Using hydrogen as a fuel might double this but it would still be insignificant.

Answer 2

Since the oceans are evaporating all the time, I suspect that even a million cars would not change things much. It would be nice if we had more rain in certain areas.

Answer 3

If H2 was a practical fuel...

The resulting H2O would be of no consequence on the environment.

We'd be converting H2O to H2 + O2... then burning it back into H2O

No net change in the amount of water on the planet.

Answer 4

If hydrogen fuel cells were to have any impact on the environment, it would most likely be a positive impact. We can't tell how nature will react to anything. Afterall, when gasoline was invented, everyone thought of it as a wonder fuel. Now look at our views on it. But it would introduce more fresh water into the environment, which if harnessed, could lower the costs for fresh water.

Answer 5

Well, hydrogen fuel is made by making existing water undergo electrolysis, so its not like you are making water out of thin air. You may, however be distributing more water to dryer places, which couldn't hurt.

Answer 6

very possibly there would be more rain. Storms may last longer as more moisture condenses and falls. But generally I think the environment will handle it quite well. The flip side is how was all the hydrogen produced for the fuel cell engines?

Was it a clean or dirty polluting process?

    Drought would still occur because some places don't get rainfall that much. Increasing rain doesn't mean you have control of where the rain falls. That is two different things. But as usual, man may construct canals to bring water to drought areas. That should make everyone happy.