Ozonosphere is mainly depleted by

Options

A. Excess CO
B. Excess `CO_(2)`
C. CFCs
D. Ozone

Answer

### Step-by-Step Solution:

1. **Understanding Ozonosphere**: The ozonosphere, commonly referred to as the ozone layer, is a region of Earth's stratosphere that contains a high concentration of ozone (O3) molecules. It plays a crucial role in protecting life on Earth by absorbing the majority of the sun's harmful ultraviolet (UV) radiation.

2. **Identifying Depleting Agents**: The ozone layer is primarily depleted by certain chemicals that are released into the atmosphere. These chemicals are often found in products such as refrigerators, solvents, propellants, and foam-blowing agents.

3. **Key Chemicals Involved**: The main culprits responsible for the depletion of the ozone layer are chlorofluorocarbons (CFCs). CFCs are man-made compounds that were widely used in various applications, including refrigeration and aerosol sprays.

4. **Mechanism of Depletion**: When CFCs are released into the atmosphere, they eventually rise to the stratosphere. Here, they are broken down by UV radiation, releasing chlorine atoms. These chlorine atoms react with ozone (O3) molecules, leading to the destruction of ozone and the formation of a "hole" in the ozone layer.

5. **Conclusion**: Therefore, the ozonosphere is mainly depleted by chlorofluorocarbons (CFCs).

### Final Answer:
Ozonosphere is mainly depleted by chlorofluorocarbons (CFCs).

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