Concentration of oxygen dissolved in water* biochemical oxygen demand (BOD) total suspended solids (TSS) dissolved oxygen (DO) chemical oxygen demand (COD) A measure of how much oxygen is consumed by bacteria or microbes as they break down organic pollutant in water * biochemical oxygen demand (BOD) total suspended solids (TSS) dissolved oxygen (DO) chemical oxygen demand (COD)

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Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.