Question

Lichens are known as pollution in indicators give reason

Answer 1

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.

Explanation:

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Answer 2

Answer:

lichens are only grow in healthy environment or non polllutant environment,,, it does not grow jn that areas where pollution occurss,, so it is indicator of pollution.