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Sharmani Gunawardena
wastewater green economy circular Pay Drechsel nutrition pollution control
02 February 20
Today, some 380 billion cubic meters (m3 = 1000 litres) of wastewater are produced annually worldwide – five times the amount of water passing over Niagara Falls annually – enough to fill Africa’s Lake Victoria in roughly seven years, Lake Ontario in four, and Lake Geneva in less than three months.
United Nations University webpage