Question

"Damage to the ozone layer is a cause of concern." Justify the statement. Suggest any two steps to limit this damage.

Answer 1

Cause of concern: Ozone layer present in the stratosphere has thinned out by about 18 % over the equator and more so over the Antartica where a big ozone hole appears every year. This has increased the level of UV-B radiations reaching the earth by 15-20%. These radiations are causing increased number of skin cancers,cataracts and reduced immunity in human beings. There is increased incidence of blinding of animals ,death of young ones, reduced photosynthesis, higher number of mutations an damage to arteries.
Steps to limit damage:
(i) Dispose of pre-1995 refrigerators, freezers, and air conditioning units properly.
(ii) Ban on production and use of chloroflurocarbons.