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763 Biochar From Human Waste Could Solve Global Fertilizer Shortages, Study Finds

Slashdot
msmash @ Slashdot · 08/11/2025 16:10 EDT

Biochar From Human Waste Could Solve Global Fertilizer Shortages, Study Finds

Biochar produced from solid human excrement could supply up to 7% of global phosphorus fertilizer needs annually, according to a Cornell University study published in PNAS. When combined with nutrients extracted from urine, the process could provide 15% of phosphorus, 17% of nitrogen, and 25% of potassium used in agriculture worldwide.

The biochar production process reduces solid waste volume and weight by up to 90%, while allowing nutrient proportions to be adjusted for specific crop requirements.





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