What is water pollution ?

Ajay read in newspaper that the Govt. was planning to clean up the Yamunas river as it had become highly polluted and its water was not fit for human consumption and other animals. Ajay discussed this issue with his teacher who explained to him the reasons. Read the above passage and answer the following questions : (i) What is water pollution ? (ii) What are its causes ? (iii) Why is Yamuna water not fit for human consumption ?

Which cause water pollution?

Indicator of water pollution :

Which causes water pollution?

Which is not a bioidicator of water pollution

What do you mean by water pollution?