Q25. 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 codes given below.
a) 1 and 2 only
b) 3 only
c) 1 and 3 only
d) 1, 2 and 3
The correct answer is 1, 2 and 3 only.
- Carbon sequestration
- Carbon sequestration is the process of storing (or capturing) atmospheric carbon dioxide.
- It is used to reduce the amount of CO2 in the atmosphere.
- Because CO2 molecules attach to the surface of coal, abandoned and uneconomic coal seams can be used to store CO2. Hence, statement 1 is correct.
- CO2 is also used as a recovery tool, such as injecting CO2 into depleted oil fields to boost oil recovery. Hence, statement 2 is correct.
- Forests serve as carbon sinks because trees are natural carbon sequesters.
- Wetland restoration, as wetlands conserve 14.5% of the world’s soil carbon; is also used for Subterranean deep saline formations. Hence, statement 3 is correct.
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