'Bad ozone' and 'good ozone' are associated with (respectively)

Options

A. Stratosphere and troposphere
B. Mesosphere and thermosphere
C. Troposphere and stratosphere
D. Thermosphere and troposphere

Answer

To solve the question regarding the association of 'bad ozone' and 'good ozone', we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ozone**: Ozone (O₃) is a gas that exists in different layers of the Earth's atmosphere. It can be beneficial or harmful depending on its location.

2. **Identifying 'Bad Ozone'**:
- 'Bad ozone' is primarily found in the **troposphere**, which is the lowest layer of the atmosphere.
- It is formed by chemical reactions between pollutants (like volatile organic compounds and nitrogen oxides) in the presence of sunlight.
- This type of ozone is harmful to human health, plants, and animals.

3. **Identifying 'Good Ozone'**:
- 'Good ozone' is located in the **stratosphere**, which is the layer above the troposphere.
- It plays a crucial role in protecting life on Earth by absorbing the majority of the sun's harmful ultraviolet (UV) radiation.

4. **Conclusion**: Based on the locations of 'bad ozone' and 'good ozone':
- Bad ozone is associated with the **troposphere**.
- Good ozone is associated with the **stratosphere**.

5. **Final Answer**: Therefore, the correct association is:
- Bad ozone - Troposphere
- Good ozone - Stratosphere