Q. Consider the following statements regarding Biochar:
1.Biochar is produced by heating agricultural and organic waste at high temperatures in the presence of oxygen.
2.Biochar application in agriculture can help reduce nitrous oxide emissions and improve water retention in nutrient-poor soils.
3.In the construction sector, biochar can serve as a carbon sink by being integrated into building materials.
Which of the above statements is/are correct?
Answer: B
Notes:
Explanation:
- Biochar is produced by heating crop residue or organic waste at 400–600°C in a low-oxygen (pyrolysis) environment, not in the presence of oxygen.
- Applying biochar in agriculture improves water retention, especially in semi-arid and nutrient-poor soils, and reduces nitrous oxide (N₂O) emissions by 30–50%.
- Biochar can be integrated into building materials to create a low-carbon construction alternative, thus serving as a long-term carbon sink.
Source: Environment (N.C.E.R.T)
