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From Submersible Design in New York, the Urine to Fertilzer DIY Kit:

We all think of human pee as gross and something that ought to be vigorously “cleaned up” or sanitized. However, human urine is actually sterile (unlike faeces, urine is bacteria-free). This liquid by product of our daily lives can be a rich food source if it gets into the RIGHT part of the right ecosystem. Now, most human urine travels untreated into the waterways and is a significant cause of eutrophication, a toxic condition caused by harmful algae blooms, in the oceans. The excess Nitrogen and Phosphorus in our urine overfeeds algae (like Red Tide) and effectively suffocates fish. However, a pioneering biological waste treament process being used in Switzerland can extract this phosphorus & nitrogen for use as a fertilizer, leaving the rest of urine almost harmless to aquatic life. This kit gives users the opportunity to replicate the new technique at home and fertilize their plants with their own pee.

Pointer from the Icelandair in-flight magazine Atlantica.

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