Existing sewage treatment plants in Dhaka treat only 30% of all sewage waste. Emerging pollutants such as antibiotics, microplastics, detergents, toothpastes, shampoos and lotion are found in Dhaka’s urban rivers and lakes. Microplastics are also found in fish, snails, crabs and sediments of the Buriganga River in Dhaka. City authorities suggest installing small treatment plants in residential buildings. DHAKA — Md. Dulal Mia, 50, ferries passengers in his small boat from one end of the Buriganga River to the other. He has been living along the river for the last three decades. “The stench from the pitch-black water is almost intolerable. Nearby factories and houses release their sewage into the…