sewage drains into the river environmental pollution |
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navigate by keyword : icona biologist catastrophe chemistry concepts conservation contamination damage danger dirty disaster drains ecological effluent environment environmental experiment industry nature outdoors poisonous pollution problems protection protective river salute sea sewage substance technology test toxic toxicology tube unhygienic wastewater water |
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Sewage drains into the river, the sea, the lake. Environmental pollution.Wastewater, ecological catastrophe |
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