Mind's Eye Green Issues (might make some 'green')

You produce some 500 litres of urine and 50 kilograms of faeces a
year. Besides the water and organic carbon, your annual output
contains around 10 kilograms of nitrogen, phosphorus and potassium
compounds, the three main nutrients plants need to grow - helpfully in
roughly the correct proportions. This is sufficient to fertilise
plants that would produce more than 200 kilograms of cereals, says
Christine Werner of the German development agency GIZ.

Scale that up and the world's population excretes 70 million tonnes of
nutrients annually. Applied to fields, this could replace almost 40
per cent of the 176 million tonnes of nutrients in chemical
fertilisers used by the world's farmers in 2011 - from New Scientist.

There are loads of ways to redeploy human waste - from planting a
banana tree so it roots under the latrine hut to large sewage
treatment (an entrepreneurial solution can be found in India - they
are know locally as honey-suckers). I wonder how any such areas we
could identify and get into action projects under an international
project system run on an enterprise basis?

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