The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole ?

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Q: 9 (IAS/2011)
The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole ?

question_subject: 

Ecology

question_exam: 

IAS

stats: 

0,268,365,67,268,67,231

keywords: 

{'ozone hole': [0, 0, 1, 1], 'antarctic region': [1, 0, 0, 2], 'prominent tropospheric turbulence': [0, 0, 0, 1], 'stratospheric clouds': [0, 0, 0, 1], 'chlorofluorocarbons': [0, 0, 0, 2], 'global warming': [3, 0, 1, 0], 'methane': [0, 0, 0, 5], 'prominent polar front': [0, 0, 0, 1], 'polar region': [3, 0, 1, 4], 'polar front': [0, 0, 0, 1], 'hole': [2, 0, 1, 1]}

The correct option is 2.

The formation of the ozone hole in the Antarctic region is primarily caused by the inflow of chlorofluorocarbons (CFCs) and halons into the stratosphere. These compounds break down in the presence of sunlight, releasing chlorine and bromine atoms, which destroy ozone molecules.

Option 1 is incorrect because tropospheric turbulence is not a significant factor in the formation of the ozone hole, and methane is not a significant contributor to ozone depletion.

Option 3 is incorrect because the absence of the polar front and stratospheric clouds is not a significant factor in the formation of the ozone hole, and methane is not a significant contributor to ozone depletion.

Option 4 is incorrect because increased temperatures in the polar regions due to global warming are not directly related to the formation of the ozone hole.