Statistical Distribution of Biological Oxygen Demand

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Statistical Distribution of Biological Oxygen Demand

The graphic is a global comparison of the biological oxygen demand measured in milligrams per litre. It covers the years from 1976-2000. The biological oxygen demand refers to the amount of oxygen required by aerobic microorganisms to decompose the organic matter in a sample of water, such as that polluted by sewage.

Year: 2005

From collection: General Archive

Cartographer: Philippe Rekacewicz, UNEP/GRID-Arendal

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