In 2024, scientists dyed Michigan’s Peter Lake blue to block sunlight, then added fertilizer; despite the dye, rain washed pigment out and algae turned it green

In Michigan, researchers experimented by dyeing Lake Peter blue to assess how shading impacts algal blooms. However, after consistent rain, the dye was washed away, highlighting that nutrient overflow still triggers these ecological issues. Previous research on Lake Peter and its counterpart, Paul Lake, uncovered early signs of blooms, emphasizing the importance of limiting nutrient inputs to avert such aquatic crises.
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