Question

what are the causes of river pollution how can it be prevent

Answer 1

most river get polluted by industrial waste
throwing garbage and put statues of god

Answer 2

human sewage or cattle excrement that is untereated cause rive pollution in the same way as fertiliser do . The natural chemicals can cause pollution. Sewage , garbage , and liquid waste of household , agricultural land , factories and dumping causes a huge problem..

preventation of pollution:

1- use fewer chemicals to clean your home
2- never pour something that isn't biodegradable down the drain
3- don't flush medications
4- don't flush trash
5- conserve as much water as possible
6- avoid using plastics

hope it will help u.
pls mark my answer as brainlist!!