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← GeographyWhich outcome arises from increased atmospheric carbon loading onto limestone?
A)Accelerated karst landscape formation✓
B)Enhanced biogenic sediment deposition
C)Increased metamorphic rock transformation
D)Slower chemical weathering intensity
💡 Explanation
Higher CO2 drives carbonic acid production, accelerating chemical weathering from dissolution; therefore karst formation increases, rather than decreased weathering or direct metamorphic change, because the chemical equilibrium of limestone favors dissolution in acidic conditions.
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