Carbon capture and sequestration activities — ground basalt, alkalising oceans, carbonated water in mines
Question
Consider the following activities: How many of the above activities are often considered and discussed for carbon capture and sequestration?
- 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
Options
Only one
Only two
All three
None
Explanation
All three are recognized geoengineering strategies for Carbon Capture and Sequestration (CCS). Spreading basalt accelerates enhanced rock weathering (locking CO2 into carbonates). Adding lime raises ocean alkalinity, boosting its natural CO2 absorption limit. Pumping carbonated water into mines represents direct geological sequestration.
Answer: (c).
Question details
Year
2023
Paper
GS Paper 1
Question
Q68
Subject
Environment
Sub-topic
Climate Change & Negotiations
Type
How-many counting
Difficulty
Medium
Nature
Current-affairs-linked
Source hint
IPCC Climate Mitigation Report / Geoengineering Enhanced Weathering
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