The peak level of ozone is present at about

Options

A. 70 km latitude
B. 100 km latitude
C. 50 km latitude
D. 30 km latitide

Answer

To solve the question regarding the peak level of ozone, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about the altitude (in kilometers) where the peak level of ozone is present.

2. **Identify Ozone**: Ozone (O3) is a molecule that forms a layer in the Earth's stratosphere. This layer is crucial as it absorbs the majority of the sun's harmful ultraviolet (UV) radiation.

3. **Locate the Ozone Layer**: The ozone layer is generally found in the stratosphere, which extends from about 10 to 50 kilometers above the Earth's surface.

4. **Determine the Peak Level**: Research indicates that the peak concentration of ozone occurs at an altitude of approximately 30 to 35 kilometers.

5. **Select the Closest Option**: Given the options provided (70 km, 150 km, or 30 km), the closest and most accurate option is 30 km.

6. **Final Answer**: Therefore, the peak level of ozone is present at about **30 kilometers**.