Why are Lichens are called air pollution indicators
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The hardy lichens are useful bio-indicators for air pollution, especially sulphur dioxide pollution, since they derive their water and essential nutrients mainly from the atmosphere rather than from the soil. They are able to react to air pollutants all year round. Compared with most physical/chemical monitors, they are inexpensive to use in evaluating air pollution.
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The hardy lichens are useful bio-indicators for air pollution, especially sulphur dioxide pollution, since they derive their water and essential nutrients mainly from the atmosphere rather than from the soil. ... Compared with most physical/chemical monitors, they are inexpensive to use in evaluating air pollution.
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