What is the primary cause of saltwater intrusion in coastal aquifers...

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What is the primary cause of saltwater intrusion in coastal aquifers?

A. Heavy rainfall

B. Over-pumping of groundwater

C. Seismic activity

D. Increased vegetation

Answer: Option B

Over-pumping of groundwater in coastal areas causes a pressure imbalance, allowing saltwater to migrate inland and contaminate freshwater aquifers.

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