The East Kolkata Wetlands processes the almost 750 million liters of wastewater and sewage produced by the region's population everyday, using the natural systems of a healthy wetland ecosystem. What was once a mix of lowland salt marshes and silted rivers is now a sprawling complex of man-made wetlands framed by green space. With the help of local farmers and fishers, the Wetlands are maintained in good health so that they may organically clean sewage through sunlight, oxygen, and beneficial microbes....
from Inhabitat - Green Design, Innovation, Architecture, Green Building https://inhabitat.com/natural-wetland-in-india-filters-198-million-gallons-of-wastewater-a-day-with-zero-chemicals
via Inhabitat
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