Question

What is the major cause of ozone depletion?

• A. Carbon Dioxide emissions
• B. Sulfur Dioxide emissions
• C. Chloro Fluro Carbons
• D. Methane emissions

Answer 1

Answer:

C. Chloro Fluro Carbons

The reasons for ozone depletion

Certain chemical substances released into the atmosphere by a variety of manufactured articles used in daily life reacts with ozone and causes its depletion. Let us see what these chemicals are and how they react.

Certain oxides of Nitrogen

Nitric oxide emitted by supersonic air crafts

Nitrous oxide formed in Tropopause

Chloro Fluro Carbons

Halons

• All these lead to chemical changes in the ozone layer which leads to the formation of ozone holes.

• It has been established that in recent times chloro-fluro carbons and halons cause, more depletion to the ozone layer. CFC's are compounds of the elements carbon, chlorine and fluorine. They are volatile, non-in flammable colourless, tasteless and chemically stable compounds

• Nations world wide observe 16th September every year as Ozone Day, with a view to making people aware of the need for ozone conservation.