MCQ
Maximum threat to the world is from :
- AGlobal warming.
- ✓Ozone hole.
- CWater pollution.
- DSoil erosion.
✓
Answer
Correct option: B.
Ozone hole.
Maximum threat to the world is from ozone layer which is found in the stratosphere. This layer acts as a shield absorbing $\text{UV}$ radiations from the sun. For the ozone layer to be intact there has to be a balance between the production and degradation which has been disturbed by the $\text{CFCs}$ used in refrigerators. The $\text{F}$ and $\text{Cl,}$ which are released by these compounds results in the thinning out of the ozone layer also known as the ozone hole. It causes threat to life and environment as it leads to skin aging and cancers, snow blindness, cataract, melting of polar ice caps, global warming etc.
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