Lakhmir Singh & Manjit Kaur - Science

Book: Lakhmir Singh & Manjit Kaur - Science

Chapter: 18. Pollution of Air and Water

Subject: Chemistry - Class 8th

Q. No. 13 of Short Answer Type Questions

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How do industries cause water pollution?

Industries cause water pollution in the following ways:

● Industries such as oil refineries, paper factories, textile and sugar mills and chemical factories discharge harmful chemicals into rivers and streams. These chemicals include arsenic, lead and flourides which are very toxic to plants and animals.

● The soil is also affected by impure water which causes changes in acidity of soil and affects the growth of worms and plants etc.

● Some industries and power plants releases hot water into the rivers. Hot water can also be considered as a pollutant. It raises the temperature of the water body and adversely affects the plants and animals living in it.

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