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Environment & EcologyHardAsked in: UPSC Civil Services · CSE Prelims 2025, GS Paper I

With reference to 'Direct Air Capture', an emerging technology, which of the following statements is/are correct? I. It can be used as a way of carbon sequestration. II. It can be a valuable approach for plastic production and in food processing. III. In aviation, it can be a source of carbon for combining with hydrogen to create synthetic low-carbon fuel. Select the correct answer using the code given below.

  1. A.I and II only
  2. B.III only
  3. C.I, II and III
  4. D.None of the above statements is correct

Correct answer

C. I, II and III

Explanation

The correct answer is C, I, II and III. Direct Air Capture pulls carbon dioxide straight out of the open air, and that CO2 can either be stored underground or used to make products.

Direct Air Capture (DAC) plants pass large volumes of air over chemical sorbents, liquid or solid, that bind CO2; heating the sorbent then releases a pure stream of the gas. When this CO2 is injected into deep rock formations it is removed from the atmosphere for good, so statement I is correct. The captured CO2 can also be a raw material: it carbonates drinks, is used in food processing and packaging, and can be built into plastics and polymers, so statement II is correct. Combined with green hydrogen, it can be turned into synthetic kerosene, a low-carbon jet fuel, so statement III is correct.

A and B are wrong because they leave out true statements, and D is wrong because all three are correct.

Exam tip: DAC = CO2 from ambient air (not a chimney); store it (removal) or use it (drinks, plastics, e-fuels with hydrogen).

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.