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Water Pollution and Treatment
Water pollution occurs when harmful substances affect the quality of water and threaten living organisms. It is a major global issue, contributing to over 14,000 daily deaths. Pollution can come from both human and natural sources. Key pollutants include nutrients from fertilizers and sewage that cause eutrophication and hypoxia, reducing oxygen levels. Various industries, agriculture, urbanization, and marine activities also pollute waterways. Water quality is measured quantitatively using tests for factors like dissolved oxygen, E. coli levels, turbidity, biochemical oxygen demand, and more to assess safety and treat pollution issues.
