Question

What does the Montreal protocol aim at?

• A. Reduction of ozone depleting substances
• B. Control of CO₂ emission
• C. Control of water pollution
• D. Biodiversity conservation

Answer 1

The correct option is A

Reduction of ozone depleting substances

The correct option is A

The explanation for the correct option:

1. Montreal Protocol was marked in Montreal (Canada) in 1987 and came into force in 1989.
2. It was an international treaty.
3. It was signed by 196 countries and European Union.
4. It becomes the first universally approved treaty in the United nation.
5. India becomes its member in June 1992.
6. It was signed after seeing the negative impact of ozone-depleting substances on the ozone layer.
7. These chemicals deplete the stratospheric layer of ozone.
8. The ozone layer protects humans from the sun's harmful UV rays
9. Harmful UV rays penetrate the human skin and cause skin cancer, can even cause DNA mutation and cornea damage.
10. It aims to control the emission of ozone-depleting substances like CFCs.

Explanations for the incorrect option:

Option B

1. The Kyoto Protocol was signed in Kyoto, Japan, in 1997 and entered into force in 2005.
2. Kyoto protocol was signed to reduce emissions of a greenhouse gas like CO₂ and methane.
3. It was an international treaty.
4. More than 150 countries signed the Kyoto protocol.

Option C

1. Water (Prevention and Control of Pollution) Act, 1974 to save our water resources.
2. Less than 0.3 % of freshwater is found in the lake and river and the remaining water is unusable to the humans
3. Drinking water is getting polluted by insecticides and dirty water emitted from thermal power plants.
4. High-temperature water from thermal power plants was causing the death of aquatic organisms leading to eutrophication.
5. Rainwater harvesting started in India to conserve water.

Option D

1. Our biodiversity can be conserved by In situ or Ex situ method.
2. A total of 1.5 million plants and animals discover so far stated to IUCN (2004).
3. Presently, 12% of all bird species, 23 % of all mammal species, 32% of all amphibian species, and 31% of all gymnosperm species face the threat of extinction.
4. Deforestation leads to the loss of shelter for millions of small insect species.

Final answer: Montreal protocol aims to control the emission of ozone-depleting substances like CFCs.