SSC CHSL 2025 PYQ — Question 87

The correct answer is Option (b): Energy stored in an object due to its position above the ground.
Explanation:

• The 'Montreal Protocol' is considered one of the most successful international treaties in environmental history. Its primary objective is to phase out the production and consumption of substances that deplete the ozone layer (such as CFCs, Halons, etc.).
• The ozone layer is primarily found in the second layer of the atmosphere, the Stratosphere. This layer absorbs harmful ultraviolet (UV) rays emanating from the Sun, thereby protecting life on Earth. If the ozone layer were to thin, it could lead to skin cancer, cataracts, and severe damage to ecosystems.

Key Points:

• Establishment: This protocol was signed on September 16, 1987, and came into force on January 1, 1989.
• Ozone Day: Since it was signed on September 16, this date is celebrated annually as 'World Ozone Day.'
• Kigali Amendment (2016): This is a significant amendment to the Montreal Protocol, aimed at gradually phasing out the use of Hydrofluorocarbons (HFCs), which are potent greenhouse gases.

Why other options are incorrect:
(a) Incorrect: The 'Kyoto Protocol' (1997) is renowned for its focus on reducing greenhouse gas emissions.
(c) Incorrect: The 'Ramsar Convention' (1971) is the effective treaty for the conservation of wetlands.
(d) Incorrect: CITES (1973) is the treaty governing the international trade of endangered species.
Important Questions for Upcoming Examinations:
Question: Which unit is used to measure the thickness of the ozone layer?
Answer: Dobson Unit (DU). Question: Over which continent was the Ozone Hole first discovered?
Answer: Antarctica.
Question: In which layer of the atmosphere do weather-related phenomena (such as rain and clouds) occur?
Answer: Troposphere.