(a) What is meant by water pollution? What are the different ways in which water gets polluted? (b) State the harmful effects of water pollution.
ScienceClass 8ICSEAnswered 28 Mar 2026
Answer
The harmful substances like sewage, toxic materials, silt etc., when gets mixed with water, causes water pollution. The pollutants which cause water pollution are the chemical waste from industries, sewage, silt, agricultural chemicals and garbage thrown into the water.
Water can be polluted by
- Water can be polluted by the flow of industrial wastes
- By human wastes
- It can be polluted from power plants which release hot
- The over usages of pesticides and fertilizers
(b)1. Toxic metals like arsenic and lead discharged by industries are harmful to plants and animals
- The hot water released by industries raises the temperatures which affect badly to plants and
- Uses of fertilizers cause the deficiency of oxygen in the
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