Microorganism group that is used as an index of sanitation
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microorganisms like lichen is a biological indicator which doesn't grow in polluted area.
The hardy lichens are useful bioindictators for air pollution, espeially sulfur dioxide pollution, since they derive their water and essential nutrients mainly from the atmosphere rather than from the soil. It also helps that they are able to react to air pollutants all year round.
The hardy lichens are useful bioindictators for air pollution, espeially sulfur dioxide pollution, since they derive their water and essential nutrients mainly from the atmosphere rather than from the soil. It also helps that they are able to react to air pollutants all year round.
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