CFCs are responsible for:

Options

A. ozone layer depletion
B. deforestation
C. acid rain .
D. None of the above

Answer

### Step-by-Step Solution:

1. **Identify CFCs**: CFCs stand for Chlorofluorocarbons. They are chemical compounds that contain chlorine, fluorine, and carbon.

2. **Sources of CFCs**: CFCs are primarily released into the atmosphere from products such as air conditioners, refrigerators, and aerosol sprays.

3. **Behavior in the Atmosphere**: Once released, CFCs are stable and non-reactive in the lower atmosphere. However, they eventually rise to the upper atmosphere.

4. **Interaction with Ozone**: In the upper atmosphere, CFCs undergo photodissociation, which means they break down due to the sun's ultraviolet (UV) radiation. This process releases chlorine atoms.

5. **Ozone Layer Impact**: The released chlorine atoms react with ozone (O3) molecules, leading to the depletion of the ozone layer. The ozone layer is crucial as it protects the Earth from harmful UV radiation.

6. **Consequences of Ozone Depletion**: With the depletion of the ozone layer, more UV radiation reaches the Earth's surface, which can lead to increased skin cancer rates, cataracts, and other health issues, as well as negative effects on ecosystems.

7. **Conclusion**: Therefore, CFCs are responsible for ozone layer depletion.

### Final Answer:
CFCs are responsible for ozone layer depletion.

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