Foam floats on the surface of the Bhangar Canal, on the eastern outskirts of Kolkata. Flowing off of the nearby Vidyadhari River, the canal receives water mostly from nearby tanneries which process leather. At various points along the canal, toxic wastewater from the tanneries is released into the nearby waterway. At sluice gates nearby, the water has turned to foam as the chemical-laced water is churned up. India. November, 2013
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