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प्रश्न
Differentiate between chemical pollution and thermal pollution.
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उत्तर
(a)
Chemical pollution:
A large number of industrial chemicals which include chemicals from paint, textile & dyestuff industry & various acids & salt solutions enter into the 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 wastewater after going through technical processes is rendered hot & on entering streams of natural water enhances the growth of harmful biological organisms.
संबंधित प्रश्न
List two major harmful effects of the following:
Rivers contaminated with sewage.
List the three major constituents of sewage.
Name the following
An agricultural pollutant in water
Answer the following question in one or two paragraphs
What are the major causes of water pollution?
Name two heavy metals from industries that pollute water.
We should keep the tap open throughout while washing utensils.
How can we reduce water pollution?
A pond contains clean water. Which of the following activities will produce least pollution of water?
Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of ______.
Thermal power plants give out a lot of hot waste water.
