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← GeographyWhich risk sharply increases when pumping groundwater excessively from karst aquifers?
A)Accelerated sinkhole formation locally occurs✓
B)Halocline transgression causes salinity inversion
C)Increased atmospheric concentration of ozone
D)Methane production exceeds oxidation rates
💡 Explanation
Sinkhole risk increases due to increased hydraulic gradient, which accelerates dissolution of the limestone bedrock; this is potentiated dissolution. Because support for surface sediment decreases, sinkholes form, therefore causing surface collapse, rather than changes in saltwater balance.
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