Scince/Envoromental Conversations: We found a way to turn urine into solid fertiliser

It’s likely that most of the food you’ll eat today was not farmed sustainably.
The global system of food production is the largest human influence on the planet’s natural cycles of nitrogen and phosphorus. How much crops can grow is limited by the amount of these two elements in the soil, so they’re applied as fertilisers.

But the majority of fertilisers are either made by converting nitrogen in the air to ammonia, which alone consumes 2% of the world’s energy and relies heavily on fossil fuels, or by mining finite resources, like phosphate rock.

Guest : Prithvi Simha - Doctoral CandidateEnvironmental Engineering GroupDepartment of Energy & Technology Swedish University of Agricultural Sciences