Q. Consider the following statements:
1.Natural sand is sourced from river beds whereas manufactured sand are the product of crushing and grading of granite stones.
2.Manufactured sand has severe environmental impacts than natural sand.
3.Manufactured sand can lead to more water and cement requirement than natural sand to achieve the expected workability.
Which of the statements given above are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: C
Notes:

Explanation –

Statement 1 and 3 are correct. Natural sand is sourced from river beds whereas manufactured sand are the product of crushing and grading of granite stones. Manufactured sand can lead to more water and cement requirement than natural sand to achieve the expected workability.

Statement 2 is incorrect. The land used for quarrying rock can be reclaimed for commercial/residential purposes or used for wetland restoration. This can help in reducing the sand mining from river beds leading to less environmental impact.

Source: The Hindu