Part of ozone is destroyed over poles during

Options

A. polar spring
B. winter
C. summer
D. period of snow fall.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks when part of the ozone layer is destroyed over the poles.

2. **Identifying the Seasons**: The options provided are polar spring, winter, summer, and period of snowfall. We need to determine which of these seasons is associated with ozone depletion.

3. **Defining Polar Spring**: Polar spring occurs from late August to October. During this time, sunlight begins to reach the poles after the long polar winter.

4. **Mechanism of Ozone Depletion**: In polar spring, the sun's rays interact with ozone-depleting substances (ODS) such as chlorofluorocarbons (CFCs), methane, and nitrogen oxides. The energy from sunlight triggers photochemical reactions that break down ozone (O₃) into oxygen (O₂) and oxygen radicals.

5. **Consequences of Ozone Depletion**: The breakdown of ozone leads to the formation of holes in the ozone layer, particularly over Antarctica. This depletion has significant environmental impacts, including increased UV radiation reaching the Earth's surface, which can lead to melting glaciers and contribute to global warming.

6. **Conclusion**: Based on the information, the correct answer to the question is that part of the ozone is destroyed over the poles during **polar spring**.

### Final Answer:
Part of ozone is destroyed over poles during **polar spring**.

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