UPSC 2023 › Environment & Ecology › Climate Change & Greenhouse Gases

4 questions · 2023 · answers as per the UPSC key

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Consider the following statements :

  1. Some microorganisms can grow in environments with temperature above the boiling point of water.
  2. Some microorganisms can grow in environments with temperature below the freezing point of water.
  3. Some microorganisms can grow in highly acidic environment with a pH below 3.

How many of the above statements are correct?

(a) Only one
(b) Only two
(c) All three
(d) None
Show answer
Answer: (c) All three

Consider the following :

  1. Aerosols
  2. Foam agents
  3. Fire retardants
  4. Lubricants In the making of how many of the above are hydrofluorocarbons used?
(a) Only one
(b) Only two
(c) Only three
(d) All four
Show answer
Answer: (c) Only three

Consider the following statements :

Statement-I : Carbon markets are likely to be one of the most widespread tools in the fight against climate change.

Statement-II : Carbon markets transfer resources from the private sector to the State.

Which one of the following is correct in respect of the above statements?

(a) Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I
(b) Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I
(c) Statement-I is correct but Statement-II is incorrect
(d) Statement-I is incorrect but Statement-II is correct
Show answer
Answer: (b) Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I

Consider the following activities :

  1. Spreading finely ground basalt rock on farmlands extensively
  2. Increasing the alkalinity of oceans by adding lime
  3. Capturing carbon dioxide released by various industries and pumping it into abandoned subterranean mines in the form of carbonated waters

How many of the above activities are often considered and discussed for carbon capture and sequestration?

(a) Only one
(b) Only two
(c) All three
(d) None
Show answer
Answer: (c) All three