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Air and Atmosphere — CHEMISTRY STD 6 — Question

ICSE BoardEnglish MediumSTD 6CHEMISTRYAir and Atmosphere2 Marks
Question
What is meant by ozone depletion?
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Answer

Ozone is present in the upper layer of the atmosphere called the stratosphere. It protects the earth from harmful ultraviolet rays of the sun.
Some air pollutants like chlorofluorocarbon (CFC) react with ozone present in the atmosphere. These pollutants reduce the density of the air. The ultra-violet rays from the sun reach directly on the earth which affects human health, causing skin diseases and cancer and also increase the earth’s temperature.

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