Power from pee? As if I need more encouragement to drink more coffee and beer.
More beer.😋
Dude! From the brewpuB to your gas tank! We would all have to pitch in to solve this problem together!
https://www.ammoniaenergy.org/articles/development-of-direct-ammonia-fuel-cells/
https://www.gencellenergy.com/gencell-technology/ammonia-fuel/
Of course they would have to adapt it to use in Cars. Ammonia is corrosive on mild steel. However, there is already ammonia available for fertilizer use at your local farm coop.
Then there is solid hydrogen....
https://edu.rsc.org/feature/fuelling-the-future-solid-phase-hydrogen-storage/2020153.article