Lichens are widely used as bioindicators of air pollution, particularly sulfur dioxide. They are sensitive to air pollutants because they absorb nutrients directly from the air and rain. Different species of lichens show varying tolerance to pollution levels; therefore, their presence, abundance, and species composition can indicate the health of the air quality in an area.
Which of the following is indicator of air pollution?
Asked in UPPCS Prelims 2021 · Topic: Pollution (Air Pollution: Types, sources, primary & secondary pollutants, smog, acid rain, effects, control technologies & policies.)
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