Question

what are the causes of river pollution ? How can it prevent ?

Answer 1

The main cause of river pollution is the uneducated people who throw sewage in river water. People also bath in river water and it causes large river pollution. People also wash their clothes in river. Large campaigns could be held in cities and people should be taught the harmful effects of water pollution. They should be told how important water is for them.
This will surely help to reduce water pollution

Make a change by being the change.