Depletion of ozone is particularly marked over

Options

A. Arctic region
B. Australia
C. New Zealand
D. Antarctic region

Answer

**Step-by-Step Solution:**

1. **Understanding Ozone Layer**: The ozone layer is a region of Earth's stratosphere that contains a high concentration of ozone (O3) and protects the planet from harmful ultraviolet (UV) radiation from the sun.

2. **Identifying Ozone Depletion**: Ozone depletion refers to the thinning of the ozone layer, which leads to an increase in UV radiation reaching the Earth's surface. This can cause various health and environmental issues.

3. **Regions of Concern**: Ozone depletion is particularly marked in certain regions of the world. The question asks where this depletion is most significant.

4. **Key Areas**: The transcript mentions that ozone depletion is particularly marked over the Antarctic region, as well as in the Arctic region, Australia, and New Zealand. However, the Antarctic region is highlighted as the area where the ozone hole is most prominent.

5. **Formation of Ozone Hole**: The term "ozone hole" refers to a large area where the ozone layer has become significantly thinner. This phenomenon is most notably observed over Antarctica.

6. **Causes of Ozone Depletion**: The primary substances responsible for ozone depletion are chlorofluorocarbons (CFCs), which are released into the atmosphere and break down ozone molecules when exposed to UV radiation.

7. **Conclusion**: Based on the information provided, the depletion of ozone is particularly marked over the Antarctic region.

**Final Answer**: The depletion of ozone is particularly marked over the Antarctic region.

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