طلای مایع: آیا می توانیم ادرار خود را به کود تبدیل کنیم؟

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. This liquid gold is very rich in nitrogen, phosphorus and potassium, three nutrients vital for plant growth.