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Environment & EcologyEasyAsked in: RRB Group D · 23 Aug 2022, Shift 1

Which of the following is NOT a result of the ozone layer depletion?

  1. A.Tsunami
  2. B.Skin cancer
  3. C.The Earth getting more UV rays from the Sun
  4. D.Immune deficiency disorders

Correct answer

A. Tsunami

Explanation

The correct answer is A, Tsunami. A tsunami is caused by an undersea earthquake, a volcanic eruption or a landslide on the ocean floor, and has nothing to do with the ozone layer.

The ozone layer lies in the stratosphere, roughly 15 to 35 km above the ground, and absorbs most of the harmful ultraviolet radiation of the Sun. Chlorofluorocarbons used in refrigerators, air conditioners and aerosol sprays release chlorine that destroys ozone, which is why the Montreal Protocol of 1987 phased them out. World Ozone Day is observed on 16 September.

Option B is a real result, because extra ultraviolet radiation damages skin cells and raises the risk of skin cancer. Option C is a real result, since a thinner layer lets more ultraviolet rays reach the Earth. Option D is a real result, as ultraviolet exposure weakens the immune system, and it also causes cataract and harms crops and plankton.

Exam tip: ozone holes bring skin cancer, cataract and weak immunity; tsunamis come from the sea floor, not the sky.

Practice Questions

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Q2.Environment & EcologyAsked in: CDS · CDS-I 2019, GKMedium

Which one of the following statements about the National Green Tribunal is not correct?

  1. A.It was set up in the year 2010.
  2. B.It is involved in effective and expeditious disposal of cases relating to environmental protection and conservation of forests.
  3. C.It may consider giving relief and compensation for damages to persons and property.
  4. D.It is bound by the procedures laid down under the Code of Civil Procedure, 1908.
Show answer
Correct answer: D. It is bound by the procedures laid down under the Code of Civil Procedure, 1908.

The National Green Tribunal is not bound by the Code of Civil Procedure; it is guided by the principles of natural justice.

Q3.Environment & EcologyAsked in: CDS · CDS-I 2018, GKHard

Consider the following statements about National Wildlife Action Plan (NWAP) of India for 2017-2031:

1. This is the Third National Wildlife Action Plan.

2. The NWAP is unique as this is the first time India has recognized the concerns relating to climate change impact on wildlife.

3. The NWAP has ten components.

Which of the statements given above is/are correct?

  1. A.1 only
  2. B.1 and 2 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: B. 1 and 2 only

The plan for 2017-2031 is India's third National Wildlife Action Plan and the first to deal with the impact of climate change on wildlife, but it has five components, not ten.