Michigan scientists in 2024 dyed a lake blue and added fertilizer to test if blocking sunlight could prevent algal blooms; rain washed away the dye and the water turned green

Scientists dyed Peter Lake blue to test sunlight reduction for algal bloom prevention. Repeated rainfall washed out the dye, allowing algae to grow. The experiment demonstrated challenges in controlling natural lake ecosystems. Excess nutrients remain a primary cause of algal blooms in waterways. This research underscores the difficulty of managing environmental interventions.

Raccontata daeconomictimes.indiatimes.com