drain urban polluted river the sandy beach sea coast ecological problem |
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| navigate by keyword : sewage nature pollution beach landscape ecology environment waste liquid garbage river surface ocean damage unhygienic water emission dirty drain sea poison muddy clay sand rains flood mud shore danger stain sewerage accident substance disaster processing dump spill ecosystem chemical dirt float chemistry plant toxicity organic bloom brown oil destruction coastline urban polluted sandy coast ecological problem |
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| Drain of urban polluted river in the sandy beach sea coast. Ecological problem. |
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