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Montreal protocol was signed in 1987 for control of

1. Emission of ozone depleting substances
2. Release of Green House gases
3. Disposal of e-wastes
4. Transport of Genetically modified organisms from one country to another

Correct answer: Emission of ozone depleting substances

Solution

The Montreal Protocol was created to phase out substances that deplete the ozone layer, especially chlorofluorocarbons and related chemicals. Its purpose was not greenhouse-gas control in general, e-waste disposal, or GMO transport.

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