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  4. Which of the following is not one of the prime health risks associated with greater UV radiations through the atmosphere due to depletion of stratospheric ozone?

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Q. Which of the following is not one of the prime health risks associated with greater UV radiations through the atmosphere due to depletion of stratospheric ozone?

AIPMTAIPMT 2015Environmental Issues

Solution:

Ultraviolet radiations are of three types - UV-C (100 - 280 nm), UV-B (280 - 320nm) and UV-A (320 - 390nm). Shorter ultraviolet radiations (UV-C) are absorbed by the atmosphere. The longer ones (UV-A), are not much harmful. The intermediate or UV-B are harmful as well as capable of deep penetration. Thinning of ozone layer increases the amount of UV-B radiations reaching the earth. UV-B radiations damage skin cells, cause ageing of skin, skin cancer and eyedamage.