Closing the Loop on Phosphorus EcoSanRes Fact Sheet 4 EcoSanRes (2005)
About half of humanity now lives in urban environments and this is increasing rapidly. To make cities more sustainable, source separation of materials and recycling must become standard practice. The principle nutrients – nitrogen, phosphorus and potassium – recycle in nature, but human intervention has created a linear, nonrecycling, open-ended system.
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EcoSanRes (2005). Closing the Loop on Phosphorus EcoSanRes Fact Sheet 4 SEI
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