large city drain drains sewage into canal that flows the river ecological problem concept environmental |
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navigate by keyword : canal catchment chemical concrete contamination culvert danger dirty drain drainage dump ecology environment environmental factory flow flowing fluid garbage green gushing industrial industry liquid natural nature old outfall pipe pipeline polluted pollution pouring river rust rusty sewage sewer sewerage station storm stream system toxic treatment tube tunnel waste wastewater water |
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A large city drain drains sewage into a canal that flows into the river. Ecological problem. The concept of environmental protection and ecology. Concrete structure that removes contaminants into the water of the reservoir |
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