What do "Blue-Green" algae blooms in lakes often indicate?

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A Excessive nutrient pollution (Eutrophication)
B A healthy ecosystem
C Low water temperature
D Too little sunlight

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Answer: A. Excessive nutrient pollution (Eutrophication)

Excess nutrients (nitrogen/phosphorus) from fertilizer runoff trigger algae blooms, reducing oxygen in water bodies.

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What do "Blue-Green" algae blooms in lakes often indicate?

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