Question

What do vehicles that run on hydrogen fuel cells emit?

Answer 1

"Apart from fumes, there is also no air pollution from hydrogen fuel cell cars at all. Conventional cars emit gases that contribute to ozone layer depletion and also to the development of acid rain. Thus, there are many issues to the use of conventional gas that use fossil fuels which could be avoided by using hydrogen cars instead."

Step-by-step explanation:

I used quotes because copying without quotes is illegal

Answer 2

Hydrogen-powered fuel cell electric vehicles emit none of these harmful substances—only water (H2O) and warm air

Step-by-step explanation:

transportation sector accounts for about one-third of U.S. carbon dioxide emissions, using these sources to produce hydrogen for transportation can cut greenhouse gas emissions