Which treaty is related to the control of the emission of ozone-depleting substances (ODS) ?

Options

A. Montreal protocol (Canada) in 1987and effective in 1989
B. The air (prevention and control of pollution act , 1981
C. The environment (Protection) act , 1986
D. Earth summit ,1992

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the treaty that is specifically related to controlling the emission of ozone-depleting substances (ODS).

2. **Identifying Relevant Treaties**: Several treaties and acts are mentioned, including:
- Montreal Protocol (1987)
- Air Prevention and Control of Pollution Act (1981)
- Environment Protection Act (1986)
- Earth Summit (1992)

3. **Focusing on Ozone Depletion**: The Montreal Protocol is known for its focus on reducing substances that deplete the ozone layer. Ozone-depleting substances include chlorofluorocarbons (CFCs) and other chemicals that harm the ozone layer.

4. **Historical Context**: The Montreal Protocol was signed in 1987 and became effective in 1989. It was created in response to the growing concern about the depletion of the ozone layer and its harmful effects, such as increased UV radiation leading to health issues like skin cancer.

5. **Conclusion**: Based on the information, the treaty that is related to the control of the emission of ozone-depleting substances is the **Montreal Protocol**.

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