Lichens are important in the studies on atmos | vedclass

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(D) Lichens,such as $Usnea$,are extremely sensitive to $SO_2$ and are widely regarded as bio-indicators of $SO_2$ pollution.They are used to determine

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Are very sensitive to pollutants like sulphur dioxide

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(D) Lichens,such as $Usnea$,are extremely sensitive to $SO_2$ and are widely regarded as bio-indicators of $SO_2$ pollution.They are used to determine the Indices of Atmospheric Purity $(IAP)$.Because they do not grow in areas with high levels of $SO_2$,their presence or absence serves as a reliable indicator of air quality.

Lichens are important in the studies on atmospheric pollution because they

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