Eli5: If using hydrogen as fuel/energy requires splitting water molecules (H2O), will we not end up using heaps of water and then run out of drinking water?

Question

I keep seeing hydrogen fuel promoted as the environmentally friendly fuel option of the future, will this not need lots of water?
A war over oil is bad enough, but wars over water are much scarier.

In: Technology

Answer 1

No. The excess product (i.e. the exhaust) of hydrogen power (both through burning and fuel cells) is water so it’s returned straight into the water cycle