What are the chief pollutants of the atmosphere which are most likely to deplete the ozone layer ?

Options

A. Hydrochloric acid
B. Photochemical smog
C. Chlorofluoro carbon (CFC) and Nitrogen Oxide
D. Sulphur dioxide

Answer

C

Explanation

Chlorofluorocarbon is widely used as refrigerant. CFC discharges in the lower part of the atmosphere move upward and reach stratosphere. In the stratosphere, UV rays act on them for releasing Cl atoms. Chlorine reacts with ozone converting into oxygen. Thus CFC have permanent and continuing effects on ozone levels.