UPSC CSE Prelims
Question 77
In the context of mitigating the impending global warming due to anthropogenic emissions of carbon dioxide, which of the following can be the potential sites for carbon sequestration ?
- Abandoned and uneconomic coal seams
- Depleted oil and gas reservoirs
- Subterranean deep saline formations
Select the correct answer using the code given below :
View correct answer and explanation
Correct answer: D
Correct Option: D
Explanation: Deep geological carbon storage can inject CO₂ into porous rock formations sealed underground; suitable abandoned coal seams, depleted hydrocarbon reservoirs and saline aquifers are candidate sites.
Statement/Pair-wise Analysis:
Statement/Item 1: Correct - Some deep unmineable coal seams can adsorb injected CO₂, subject to geological suitability.
Statement/Item 2: Correct - Depleted oil/gas reservoirs are studied for storage due to known trap structures and rock data.
Statement/Item 3: Correct - Deep saline formations are an important potential large-capacity storage option.
Option-wise Analysis:
A: Incorrect - omits correct statement/item 3.
B: Incorrect - omits correct statement/items 1, 2.
C: Incorrect - omits correct statement/item 2.
D: Correct - includes all and only the true statements/items.