In troposphere, `O_(3)` promotes

Options

A. Oxidation of biochemicals
B. Destruction of chlorenchyma
C. Both A and B
D. Growth of plants

Answer

To solve the question "In troposphere, O3 promotes," we will analyze the options provided and understand the role of ozone (O3) in the troposphere.

### Step-by-Step Solution:

1. **Understanding the Layers of the Atmosphere**:
- The Earth's atmosphere consists of several layers, with the troposphere being the layer closest to the Earth's surface. Above the troposphere is the stratosphere.

2. **Identifying the Nature of Ozone (O3)**:
- Ozone (O3) exists in two forms:
- In the stratosphere, it is referred to as "good ozone" because it protects life on Earth by absorbing harmful ultraviolet (UV) radiation.
- In the troposphere, ozone is considered "bad ozone" because it acts as a pollutant.

3. **Effects of Ozone in the Troposphere**:
- As a pollutant, ozone in the troposphere promotes the oxidation of various biochemicals. This means it can react with and degrade organic compounds, which can be harmful to living organisms.
- Additionally, ozone can lead to the destruction of chlorenchyma, which is a type of plant tissue that contains chlorophyll and is essential for photosynthesis. The destruction of chlorenchyma would hinder the plant's ability to produce food.

4. **Analyzing the Options**:
- **Option 1**: Oxidation of biochemicals - This is correct.
- **Option 2**: Destruction of chlorenchyma - This is also correct.
- **Option 3**: Both A and B - Since both options 1 and 2 are correct, this option is the best choice.
- **Option 4**: Growth of plants - This is not directly promoted by ozone in the troposphere; in fact, ozone can be detrimental to plant growth.

5. **Conclusion**:
- The correct answer is **Option 3: Both A and B**.