Answer the following questions:
1. Mention to causes of Ozone depletion
2. How does increase in population cause Ozone depletion?
3. What are CFCs and what is their role in ozone depletion
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Answers
Answer:
(1)The two causes of ozone depletion are:-
(i)damage to skin cells
(ii)damage to DNA and leads to mutation
(2)Ozone layer depletion increases the amount of UVB that reaches the Earth’s surface. Laboratory and epidemiological studies demonstrate that UVB causes non-melanoma skin cancer and plays a major role in malignant melanoma development. In addition, UVB has been linked to the development of cataracts, a clouding of the eye’s lens.
(3)Chlorofluorocarbons (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. ... The chlorine atoms act as a catalyst, and each can break down tens of thousands of ozone molecules before being removed from the stratosphere.
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