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प्रश्न
How depletion of the ozone layer affect living organisms?
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उत्तर
- The thinning of the ozone layer results in an increase in the levels of UV radiation reaching the earth’s surface. In humans, increased UV radiation causes ageing of the skin, damage/injuries to skin cells and skin cancers including melanoma.
- It also causes cataracts and even permanent damage to the cornea, weakening of immune system. UV radiation also causes mutations in living organisms.
- DNA and proteins of living cells absorb the UV rays, and high energy of UV radiation breaks the chemical bonds of these molecules, thus affecting normal metabolism.
- UV radiation inhibits photosynthesis in most phytoplanktons as it penetrates through the ocean water. This affects the entire food chain in the aquatic ecosystem.
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संबंधित प्रश्न
How does ozone layer protect us from harmful effects in the environment?
The excessive exposure of humans to ultraviolet rays results in:
- damage to immune system
- damage to lungs
- skin cancer
- peptic ulcers
O2 is converted into O3 by the action of :
(a) infrared radiations
(b) ultraviolet radiations
(c) gamma radiations
(d) cosmic radiations
How is ozone formed in the higher level of atmosphere?
“Damage to the ozone layer is a cause of concern”. Justify this statement.
Give scientific reasons:
Ozone present in the stratosphere is called as “good ozone”.
How are CFCs harmful?
Give Technical Terms:
The chemicals leading to the formation of ozone holes.
Enumerate methods of protecting the ozone layer and preventing its depletion.
Which spectrum of the light harmful to organism: ____________.
