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← GeographyWhich environmental consequence arises when concentrated agricultural runoff accelerates limestone dissolution?
A)Nutrient release induces coastal eutrophication✓
B)Increased sediment clogs underground aquifers
C)Reduced salinity harms mangrove ecosystems
D)Enhanced carbon sequestration offsets emissions
💡 Explanation
Accelerated dissolution releases phosphate from phosphate-rich limestone deposits because the increased acidity from runoff mineralization drives mineral weathering, therefore high phosphate levels in rivers cause unwanted enrichment downstream rather than carbon reduction under the sea.
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