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?
Show answer
Answer: C. All three are carbon removal ideas. Spreading crushed basalt (enhanced weathering) locks CO2 into minerals. Adding lime to oceans raises alkalinity so seawater absorbs more CO2. Pumping CO2 as carbonated water into underground rocks or mines stores it permanently. So all three.
Watch for: Rock spreading on farms sounds like a soil practice, but it is a known CO2 removal method.
Why the other options are wrong
- A. Wrong because all three methods are discussed for carbon removal.
- B. Wrong because all three methods are discussed for carbon removal.
- D. Wrong because all three are recognised carbon capture approaches.
Source to check: IPCC Sixth Assessment Report, Working Group III (2022), Chapter 12 (carbon dioxide removal methods)
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.