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Environment & EcologyEasyAsked in: Bihar · BPSC 68th CCE Pre, 12 Feb 2023

Which gas contributes to global warming through its greenhouse effect?

  1. A.Carbon dioxide
  2. B.Water Vapour
  3. C.CFC
  4. D.More than one of the above

Correct answer

D. More than one of the above

Explanation

The correct answer is D, More than one of the above. Carbon dioxide, water vapour and CFCs are all greenhouse gases, because each of them traps the heat that the Earth gives off and warms the lower atmosphere. Water vapour is the most plentiful greenhouse gas in the air, while carbon dioxide from burning coal, oil and gas is the main one that human activity keeps adding. CFCs, once used in refrigerators and aerosol sprays, do double damage: they trap heat and they also destroy the ozone layer, which is why the Montreal Protocol of 1987 phased them out. Methane and nitrous oxide are other important greenhouse gases. Option A is incomplete because carbon dioxide is only one of the gases listed that trap heat. Option B is incomplete because water vapour also traps heat but is not the only such gas here. Option C is incomplete because CFCs are greenhouse gases too, but so are the other two. Exam tip: the main greenhouse gases are water vapour, carbon dioxide, methane, nitrous oxide and CFCs.

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.