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Why do not lichens occur in Delhi whereas they commonly grow in Manali or Darjeeling?

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asked Sep 16, 2017 in Biology by Golu (37,045 points) ● 19 ● 146 ● 416

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answered Sep 16, 2017 by Ankit Agarwal (28,847 points) ● 7 ● 32 ● 69
selected Sep 17, 2017 by Golu
 
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Lichen is a bio-indicator and sensitive to SO2 pollution from automobiles. Delhi has maximum number of automobiles, hence has a highly polluted environment.

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