Dumping of waste materials is one of the cause for water pollution in Ganga river.
Given are a few practices associated with ganga river that people do generally. Pick out those that pollute the ganga river.
1) Industries dump there chemical waste in ganga
2) We use river for transportation
3) Washer men use ganga water to wash clothes on the river banks
4) We build turbine on the flowing water of river ganga to generate electricity
5) After cremation ashes of dead bodies and the unburnt bodies are immersed in the ganga river.
6) Use of river water for irrigation.