CBSE Class 12-science Answered
Why are
lichens regarded as pollution indicators?
Asked by Topperlearning User | 16 Jun, 2014, 01:22: PM
Expert Answer
Lichens are regarded as pollution indicators because they are sensitive to sulphur dioxide (SO2) and do not grow in polluted areas. Their presence indicates the absence of pollution in an area, and their absence indicates that the area is polluted.
Answered by | 16 Jun, 2014, 03:22: PM
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