UPSC Previous Year Question | Prelims GS | 2023

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?

  1. Only one
  2. Only two
  3. All three
  4. None

Answer

Correct Answer

All three

Explanation

Enhanced weathering with basalt rock, ocean alkalinity enhancement with lime, and injecting captured CO2 into subterranean mines (as carbonated water for mineralization) are all discussed carbon dioxide removal/capture and sequestration approaches.

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