Question

Ozone layer is being depleted. This is due to :

• A. NO (Nitrogen oxide) emission from supersonic jets
• B. Chlorofluorocarbon used as aerosols
• C. Both (a) and (b)
• D. None of the above

Answer 1

Answer: (C)

Both (a) and (b)

Chlorofluorocarbons (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for ozone depletion.

Depletion of the ozone layer is likely to aggravate existing health effects caused by exposure to UV radiation, as stratospheric ozone is a particularly effective UV radiation absorber. As the ozone layer becomes thinner, the protective filter provided by the atmosphere is progressively reduced.

Consequently, human beings and the environment are exposed to higher UV radiation levels, and especially higher UV levels that have the greatest impact on human health, animals, marine organisms and plant life.

Hence, option C is correct.