Question

what do you mean by pollutants what is the causes of water pollution

Answer 1

Water pollution is the contamination of water bodies (like oceans, seas, lakes, rivers, aquifers and groundwater) usually caused due to human activities. ... These days chemicals, bacteria and other pollutants are even affecting our drinking water.

Answer 2

Pollutants are the substance that pollutes air, rivers, etc.
The causes of water pollution are :
Sewage, acid rain, global warming, dumping, etc.