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← GeographyWhich outcome contributes to decreased stalactite growth rates in heavily vegetated karst regions?
A)Increased soil CO₂ diffusion rates✓
B)Elevated groundwater calcium carbonate saturation
C)Diminished vadose zone percolation rates
D)Enhanced bedrock hydraulic conductivity locally
💡 Explanation
Increased soil CO₂ diffusion into the karst system enhances carbonic acid formation, which increases limestone dissolution during infiltration, because this 'dissolution front' consumes available calcium. Therefore groundwater remains less saturated, restricting cave deposition, stalactite growth therefore decreases, rather than saturation raising it
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