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Consider the following statements:
1. The Stratosphere contains about 90% of all the ozone in the atmosphere.
2. The ozone in the stratosphere is destroyed by man-made chemicals such as chlorofluorocarbons (CFCs) and hydrofluorocarbons (HFCs).
3. The Kigali Amendment to the Montreal Protocol aims to phase-down chlorofluorocarbons (CFCs).
Which of the statements given above is/are correct?
  • a)
    1 only
  • b)
    1 and 2 only
  • c)
    3 only
  • d)
    1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Consider the following statements:1. The Stratosphere contains about 9...
  • Every year, 16th September is observed as the International Day for the Preservation of the Ozone layer (World Ozone Day).
  • Ozone is a special form of oxygen with the chemical formula O3. Most ozone resides high up in the atmosphere, between 10 and 40km above Earth's surface. This region is called the stratosphere and it contains about 90% of all the ozone in the atmosphere. Hence, statement 1 is correct.
  • The ozone in stratosphere is destroyed by man-made chemicals referred to as Ozone-Depleting Substances (ODS), including chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons, methyl bromide, carbon tetrachloride, and methyl chloroform. Hence, statement 2 is correct.
  • After the Montreal Protocol on Substances that deplete the ozone layer signed by almost every country in 1987, the United Nation General Assembly, in 1994, proclaimed this day as the International Day for the Prevention of the Ozone Layer.
  • In 2016 as a continuation of the global effort the Parties to the Montreal Protocol reached agreement at their 28th Meeting of the Parties in Kigali, Rwanda to phase-down hydrofluorocarbons (HFCs). Hence, statement 3 is not correct.
    • Recently, the Indian Government approved the ratification of the Kigali Amendment to the Montreal Protocol.
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Consider the following statements:1. The Stratosphere contains about 90% of all the ozone in the atmosphere.2. The ozone in the stratosphere is destroyed by man-made chemicals such as chlorofluorocarbons (CFCs) and hydrofluorocarbons (HFCs).3. The Kigali Amendment to the Montreal Protocol aims to phase-down chlorofluorocarbons (CFCs).Which of the statements given above is/are correct?a)1 onlyb)1 and 2 onlyc)3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?
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