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Answer: 1. Montreal Protocol

Key idea: The Montreal Protocol (1987) controls substances that deplete the ozone layer, mainly CFCs.

Kyoto Protocol deals with greenhouse gas emissions (climate change). Gothenburg Protocol deals with acidification, eutrophication and ground-level ozone. Geneva Protocol concerns chemical and biological weapons. So the answer is Montreal Protocol.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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