A polluted capital

A few months ago, I had got a chance to go to Dhaka in order to attend a debate competition and took the opportunity to see the important places in Dhaka city. Now it is a city of pollution. Air, water are polluted severely because of unplanned urbanisation and indiscriminate throwing of wastes. The entrance gate of Dhaka city was a shocking experience for me. The ponds beside the railway stations of Dhaka city (i.e. airport, cantonment, Kamalapur, Mughdapara & so on) looked like black lakes or ponds. I did not see the natural colour of ponds in the city.
So, I would like to request the authorities concerned to ponder over this matter seriously and take remedial measures.