A location with luxuriant growth of lichens on the trees indicates that the :
- trees are very healthy
- trees are heavily infested
- location is highly polluted
- location is not polluted
Answer
(4) location is not polluted
Solution
As per NCERT, lichens are very good pollution indicators — they do not grow in polluted areas.
∵ Lichens are highly sensitive to air pollutants such as SO2.
∴ Luxuriant growth of lichens on trees shows that the location is not polluted.
Answer: (4)