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Question

Because of the increased use of CFCs, the ozone layer has been compromised on, allowing UV radiation to reach the earth’s surface.
Based on the information given, pick the correct statement.


A
A person living in Africa is more likely to develop skin cancer because of UV radiation
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B
A person living in Antarctica is more likely to develop skin cancer because of UV radiation
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C
A person living in Africa is less likely to develop skin cancer because UV radiation is not harmful
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D
A person living in Antarctica is less likely to develop skin cancer because UV radiation is not harmful
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Solution

The correct option is B A person living in Antarctica is more likely to develop skin cancer because of UV radiation

Since chlorine that is formed by the dissociation of CFCs is responsible for destroying thousands of ozone molecules, it is true that in areas where chlorine can rise high up into the atmosphere, there is a greater threat to the integrity of the ozone layer. It is known that Polar Stratospheric Clouds (PSCs) are formed at the poles where temperatures are low. Chlorine atoms bind to the PSCs and rise up into the atmosphere near the poles. This puts the ozone region near the poles at the risk of dissociation. Since Antarctica is around the South Pole where the ozone layer is deteriorating, it holds true that that a person living in Antarctica is more likely to be subject to UV radiations, as the primary role of the Ozone layer is to block these UV radiations from reaching the earth’s surface. If you couple this with the fact that UV radiations are harmful and can cause skin cancer, it becomes clear that a person living in Antarctica is more likely develop skin cancer from harmful UV radiations than a person who lives in Africa.


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