🚽 NEW: Urine carries the #nitrogen, #phosphorus, and #potassium crops need, so ancient farmers used it on fields.
Modern synthetic fertilizers replaced that practice but rely on #naturalgas and finite #rock. As costs climb, researchers are reviving '#peecycling', using urine-diverting toilets to capture and process the resource.
👉 phys.org/news/2026-09-liquid-g…
#science #fertilizer #sustainability #agriculture #plants #environment #ecology #food #waste #soil #history #renewables
Liquid gold: Could we turn our urine into fertilizer?
For thousands of years, human urine has had real value. After our bodies absorb nutrients from our food, they excrete the rest—mainly via urine. An adult produces about 500 liters (132 gallons) a year.Jordan Roods (Phys.org)