A polluted water body like a lake or a pond has been contaminated by various forms of pollution like chemicals, untreated sewage, septic overflow, industrial wastewater, solid waste dumping and agricultural runoff. When a water body becomes polluted, it can negatively impact the health of the ecosystem and the plants, animals, and people who depend on it. Normally a polluted lake or a pond would have decreased oxygen levels, reduced biodiversity, unwanted algal blooms and the presence of other toxic substances that can harm the environment, aquatic life and humans. Polluted lakes & pond
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