Hydrogen Fuel Cells, Greenhouse Gases and the USSC (off topic)

Earlier this year the United States Supreme Court (USSC) ruled that greenhouse gases are a pollutant.

A couple nights ago I watched Alan Alda on PBS talking about hydrogen fuel cells. I had seen the program before but that was also before the new USSC ruling on greenhouse gases.

Ya see when hydrogen fuel cells create energy the exhaust is water and water vapor.

Wator vapor is a greenhouse gas.

Not only that but it will be added water vapor. IOW the water and water vapor that are exhausted will be added to the existing water and water vapor already here.

We will no longer only be consumers/ recyclers of existing water. We will be producing H2O at a rate dependent on the number of fuel cells operating and their output.

The only way to prevent this would be to extract the hydrogen to be used from water in the first place. However that was not mentioned in the program. So far only alternative methods of getting the hydrogen have been used.

The PBS program also said hydrogen fuel cells produce zero emissions. That just changed with the USSC ruling as water vapor is a greenhouse gas and as such is a pollutant.

In the end if we make the switch to hydrogen fuel cells we can look forward to a warmer and wetter planet. "Waterworld" here we come!