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The Barapullah creek in Delhi is like an open sewer. TU Delft researchers are using it to develop purification techniques. They are scaling up from 100 to 10,000 litres a day.

Carcasses of dogs, pigs and goats drifting by

The Barapullah creek in Delhi is like an open sewer. TU Delft researchers are using it to develop purification techniques. They are scaling up from 100 to 10,000 litres a day....

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