Ncert Exercises & Solutions

Ozone is a toxic gas and is a strong oxidising agent even then its presence in the stratosphere is very important. Explain what would happen if ozone from this region is completely removed?

The ozone layer in the startosphere is a natural feature of the earth's environment. The ozone layer exists between 20 to 35 km above the earth surface layer. This payer protects the earth from the harmful effects of the ultraviolet radiation of the sun.

A depletion of ozone layer is considered as a serious threat to all forms of life on the earth. A 5% decrease in ozone concentration could increase the incidence of skin cancer by 20%. Ultraviolet radiation is also the factor for disease of eye, including cataract formation.

It can cause genetic mutations and destroy crops and other forms of vegetation. Aquatic animals and aquatic plants are generally affected by UV-radiation.

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