Science, asked by letnee5003, 9 months ago

Why are lichens called pollution indicators?

Answers

Answered by UtkarshRaj21

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 Sachinarjun

Explanation:

Because lichens are used to prepare litmus paper which tells about the acidity or basicity of a substance which is mainly caused by the pollution.

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