A location with luxuriant growth of lichens on the trees indicates that the:

A location with luxuriant growth of lichens on the trees indicates that the:
  1. Trees are very healthy
  2. Trees are heavily infested
  3. Location is highly polluted
  4. Location is not polluted

Solution

Lichens are indicators of SO2 pollution. If the location is not polluted by SO2 then the growth of lichen will enhance. Lichens are also useful in the detection of toxic elemental pollutants and radioactive metals.

Asked in: NEET 2014

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