Which one of the following is the well known example of bioindicator of air pollution?

ಉತ್ತರ ತೋರಿಸು ಮತ್ತು ವಿವರಣೆ

ಉತ್ತರ: (A) Lichens

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Lichens are highly sensitive to SO2 and are a well-known bioindicator of air pollution: they disappear from polluted areas.