"Lichens are called pollution indicators. "justify the statement by suitable reason.
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Answered by
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Lichen is highly sensitive to air pollution and it dies off rapidly in dirty air. It acts as an indicator by not being there in polluted atmospheres.
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Answered by
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The following reasons in support of the given statement:
1. Lichens are sensitive to Sulphur Dioxide (SO₂) and thus they do not grow in the areas that are polluted.
2. They are highly sensitive to air pollution therefore, it one tries to grow them in a polluted environment it dies off rapidly in polluted air.
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