UPSC Prelims 2023 – Question 68

Q68. 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 

Correct Answer: Option (c) 

• Carbon sequestration is the technology designed to tackle global warming by capturing CO₂ at power stations, industrial sites or even directly from the air and permanently storing it underground. It describes the long-term storage of carbon dioxide or other forms of carbon to either mitigate or defer global warming. Some of the methods of Carbon sequestration are: 

• Spreading finely ground basalt rock on farmlands extensively 
• Increasing the alkalinity of oceans by adding lime 
• Capturing carbon dioxide directly or indirectly from the atmosphere and then storing or burying it in a suitable deep, underground location. 
• Hence, option (c) is correct. 

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