The Montreal Protocol came into force in the year ________.

Question

Question

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RRB JE CBT 2 (Mechanical Engineering) ReExam Official Paper (Held On: 04 Jun, 2025)

Answer 1

The Correct answer is 1989.

Key Points

The Montreal Protocol is an international treaty designed to protect the ozone layer by phasing out the production and consumption of numerous substances responsible for ozone depletion.
It was adopted on 16 September 1987, but came into force on 1 January 1989.
The protocol focuses primarily on eliminating substances such as chlorofluorocarbons (CFCs), halons, and other ozone-depleting chemicals.
The treaty has been hailed as one of the most successful environmental agreements globally, achieving near-universal ratification with 197 member states.
The treaty is constantly updated through amendments, such as the London (1990), Copenhagen (1992), Montreal (1997), and Kigali (2016) amendments.
The Montreal Protocol plays a crucial role in combatting climate change, as many ozone-depleting substances are also potent greenhouse gases.
It is governed by the United Nations Environment Programme (UNEP).
The protocol has led to the recovery of the ozone layer, with projections suggesting that the layer will return to its pre-1980 levels by the mid-21st century.

Additional Information

1990: The London Amendment to the Montreal Protocol was adopted in 1990, which expanded the scope of the treaty by adding new controlled substances and stricter measures.
1992: The Copenhagen Amendment was adopted in 1992, introducing further control measures and accelerating the phase-out schedules for ozone-depleting substances.