Carbon sequestration sites: coal seams, reservoirs, saline formations – UPSC Prelims PYQ...

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?

1. Abandoned and uneconomic coal seams
2. Depleted oil and gas reservoirs
3. Subterranean deep saline formations

Select the correct answer using the code given below:

1. 1 and 2 only
2. 3 only
3. 1 and 3 only
4. 1, 2 and 3

Explanation

All options are correct

• Carbon sequestration is the process of capturing and long-term storing atmospheric carbon dioxide. Carbon capture and sequestration (CCS) is a three-step process including capturing carbon dioxide from its point source, its transportation and then storage away from the atmosphere. Storage options in geological formations are deep saline aquifers, basalt formations, unmineable coal seams and depleted oil or gas reservoirs.

Answer: (d) 1, 2 and 3; Difficulty Level: Easy