The Montreal Protocol was ratified in what year?

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Multiple Choice

The Montreal Protocol was ratified in what year?

Timing of international treaties hinges on when countries first agree to the terms. The Montreal Protocol was opened for signature in 1987 in Montreal, and ratifications began that same year, which is why 1987 is the correct year. It didn’t take effect until 1989, after enough parties had ratified it, but the question asks for the year of ratification, not when it entered into force. The other years are later milestones and don’t reflect the initial ratification.

Timing of international treaties hinges on when countries first agree to the terms. The Montreal Protocol was opened for signature in 1987 in Montreal, and ratifications began that same year, which is why 1987 is the correct year. It didn’t take effect until 1989, after enough parties had ratified it, but the question asks for the year of ratification, not when it entered into force. The other years are later milestones and don’t reflect the initial ratification.

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