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← GeographyWhich outcome occurs when carbonic acid concentration increases?
A)Accelerated limestone dissolution and karst widening✓
B)Deposition of travertine terraces increases steadily
C)Reduced speleothem formation inside groundwater caves
D)Decreased calcium carbonate saturation of streams
💡 Explanation
Increased carbonic acid drives accelerated limestone dissolution via chemical weathering because it enhances the solubility of calcium carbonate. Elevated concentrations lead to widening existing karst features such as sinkholes, therefore accelerating dissolution occurs rather than slowing the process.
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