Definition of "water pollution" []

• Contamination of water, especially surface water, by sewage effluent, fertilizer runoff, industrial chemical discharge etc. (noun)

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• "In the Indoor Air, Water, and Chemicals Seminar students learn about indoor air and water pollution and chemical issues, and formaldehyde, biological contaminants, asbestos, carbon monoxide, and other nasties are discussed."
• "If you’re talking about air or water pollution or global warming now renamed “global climate change”, use environment, from the Latin viron, “circle.”"