On a humid summer afternoon, Gagan Das mixes groundnut and mustard meal in water in a large drum. On either side of him, large ponds reflect the sun. Mango trees laden with fruit, palms heavy with their payload of yellow dates and shady neem trees line the embankments. It is... The post These Wetlands Treat the Wastewater of a Megacity appeared first on Reasons to be Cheerful .