In upper stratosphere, ozone protects us from:

Options

A. infra-red radiations
B. ultra-violet radiations
C. carbon dioxide
D. peroxyacetyl nitrate.

Answer

**Step-by-Step Solution:**

1. **Understanding the Location of Ozone:**
- The ozone layer is primarily located in the stratosphere, which is the second layer of the Earth's atmosphere. It extends from about 10 to 40 kilometers above the Earth's surface.

2. **Function of Ozone:**
- Ozone (O₃) in the stratosphere plays a crucial role in absorbing the majority of the sun's harmful ultraviolet (UV) radiation. This is important for protecting living organisms on Earth.

3. **Types of Ultraviolet Radiation:**
- Ultraviolet radiation from the sun is categorized into three types: UVA, UVB, and UVC. Ozone effectively absorbs most of the UVC and a significant portion of UVB radiation, which are the most harmful types.

4. **Conclusion:**
- Therefore, the primary function of ozone in the upper stratosphere is to protect us from harmful ultraviolet radiation emitted by the sun.

5. **Correct Answer:**
- The correct answer to the question is that ozone protects us from ultraviolet radiation.

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