Differentiate between chemical pollution and thermal pollution.

1.	Differentiate between chemical pollution and thermal pollution.
Answer» (a) Chemical pollution — A large number of industrial chemicals which include chemicals from paint, textile & dyestuff industry & various acids & salt solutions enter into water when discharged as industrial wastes. Chemical pollutants include — Metallic salt solutions of mercury & lead which cause heavy devastation of marine & plant life. Agricultural wastes include — Poisonous pesticides namely fungicides & insecticides which may also enter underground water through the soil. (b) Thermal pollution — Certain industries such as the iron & steel industry & numerous chemical plants use large amounts of water for varied functions. The discharged waste water after going through technical processes – is rendered hot & on entering streams of natural water – enhance growth of harmful biological organisms.

Answer»

(a) Chemical pollution — A large number of industrial chemicals which include chemicals from paint, textile & dyestuff industry & various acids & salt solutions enter into water when discharged as industrial wastes.

Chemical pollutants include — Metallic salt solutions of mercury & lead which cause heavy devastation of marine & plant life.

Agricultural wastes include — Poisonous pesticides namely fungicides & insecticides which may also enter underground water through the soil.

(b) Thermal pollution — Certain industries such as the iron & steel industry & numerous chemical plants use large amounts of water for varied functions. The discharged waste water after going through technical processes – is rendered hot & on entering streams of natural water – enhance growth of harmful biological organisms.

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