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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
A large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest a reason for the fish kill.
Give an appropriate biological/technical term for the following:
The type of waste generated in hospitals and pathological laboratories.
Give one example of A water pollutant.
Classify the given sources of water pollution as natural and manmade:
(1) domestic waste
(2) dead animals
(3) oil spills
(4) ashes released due to forest fires
What are the common sources of oil spills?
How could warm water act as a pollutant?
Usage of chemical pesticides and fertilisers causes ________ pollution.
Why does water need conservation even though large oceans surround the landmasses?
Explain about oil spills.
Hot water discharged into water bodies hardly affects the fish and other aquatic life.
