RossThese days watching the news, I'm constantly reminded that an adult produces 1.5 L of urine daily, requesting 11 kg of urea and 0.77 kg of hydrogen gas per year.
Straights of Hormuz needn't be involved for agricultural urea production.
Interesting look at urea extraction from #wastewater in this 2023 paper. Need to see more investment in this space.
https://www.sciencedirect.com/science/article/pii/S1383586623005609