In Bangladesh's capital, Dhaka, the government has declared three rivers as "biologically dead" due to the effluent from surrounding garment factories.
That is because the country has grown into a cheap clothing manufacturing hub of the world.
But poor regulation of the industry is taking a toll on its rivers and the health of the poor who live nearby.
Al Jazeera's Tanvir Chowdhury reports from Savar in Bangladesh.
