The Peruvian city of Cusco is situated 3500 meters above sea level. Until recently, it stank to high heaven. Thanks to modern sewage management, its wastewater treatment facilities are environmentally friendly - and the stench has disappeared.
Until recently, the Peruvian city Cusco stank. But thanks to a more modern sewage system, the Andean metropolis is now not only easier on the climate - it's also easier on the nose. The system even creates biogas.
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