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Environmental pollution, environmental disaster. Discharge of polluted sewage into the river from factory concrete pipes. Hazardous waste water. Environmental protection. Water pollution.

Environmental pollution, environmental disaster. Discharge of polluted sewage into the river from factory concrete pipes. Hazardous waste water. Environmental protection. Water

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Environmental pollution, environmental disaster. Discharge of polluted sewage into the river from factory concrete pipes. Hazardous waste water. Environmental protection. Water pollution.

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