Question

Which of the following can cause contamination of an aquifer?

• A. Excavation and mining
• B. Excessive use of fertilisers
• C. Building bawris
• D. Septic tank leakage

Answer 1

Answer: (A), (B), (D)

The correct options are
A Excavation and mining
B Excessive use of fertilisers
D Septic tank leakage

An aquifer is an underground layer of water-bearing rock. Excavation and mining, excessive use of fertilisers and septic tank leakage can contaminate underground water. However, building bawris do not contaminate underground water. Bawris are structures dug in the ground which have steps to reach the water stored. These are used to store water in rural areas.