Description : Dinghy boats are used to ferry people over the polluted waters of the Buriganga river, near the Hazaribagh Tannery area in Dhaka city, in Bangladesh. About 80% sewage of Dhaka city is released directly into the river daily making its water pitch black and gluey. According to the Environment Department up to 40,000 tons of untreated tannery waste is also released directly into the river on daily basis. Dhaka, Bangladesh.