Global agreement in specific control strategies to reduce the release of ozone depleting substances, was adopted by

Options

A. Rio de Janeiro Conference
B. Montreal Protocol
C. Kyoto Protocol
D. Vienna Convention

Answer

To answer the question regarding the global agreement in specific control strategies to reduce the release of ozone-depleting substances, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Context**: The question is about a global agreement aimed at controlling substances that deplete the ozone layer. Understanding the significance of the ozone layer and the substances that harm it is crucial.

2. **List the Options**: The options provided are:
- Rio de Janeiro Conference
- Montreal Protocol
- Kyoto Protocol
- Vienna Convention

3. **Analyze Each Option**:
- **Rio de Janeiro Conference**: This was primarily focused on broader environmental issues and sustainable development, not specifically on ozone-depleting substances.
- **Montreal Protocol**: This is a specific international treaty designed to phase out substances that deplete the ozone layer, such as chlorofluorocarbons (CFCs).
- **Kyoto Protocol**: This agreement focuses on reducing greenhouse gas emissions to combat global warming, not specifically on ozone depletion.
- **Vienna Convention**: While this convention addresses the protection of the ozone layer, it does not specifically lay out control strategies like the Montreal Protocol does.

4. **Determine the Correct Answer**: Given the analysis, the Montreal Protocol is the correct answer as it specifically targets the reduction of ozone-depleting substances through established control strategies.

5. **Conclude**: Therefore, the global agreement in specific control strategies to reduce the release of ozone-depleting substances was adopted by the **Montreal Protocol**.

### Final Answer:
The correct answer is **Montreal Protocol**.

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