Library Index :: The Environment: Assimilative capacity to Biofilm
 

background level

Natural, Area, Control, Measure, Against, Medium, Human, and Water

The ambient or typical level of a substance that occurs in an environmental medium (air, water, or soil) in a particular place or area, through natural processes or from natural sources. This is often used as a baseline against which to measure changes that result from human activities, including pollution control.

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