Eutrophication — How a Lake Suffocates – 3D Interactive Model | UPSC GS-III Environment · Pollution

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Cross-section

Nutrient runoff (N+P)
Algal bloom
Healthy O₂
Hypoxia / dead zone
Fish

Watch the cycle: runoff → bloom → O₂ crash → dead zone · check the oxygen meter

Source: NCERT Class 12 Biology & CPCB water-quality reports · Interactive 3D learning model

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