A location with luxuriant growth of lichens on the trees indicates that the:
Correct answer: D. Location is not polluted
- A. Trees are very healthy
- B. Trees are heavily infested
- C. Location is highly polluted
- D. Location is not polluted
Explanation
Lichens are very sensitive to SO2 and pollution and are completely destroyed at places with the presence of these substances. Therefore, they act as very good indicators of SO 2 and pollution. A location with luxuriant growth of lichens on the trees generally indicates that the air quality in that area is relatively clean and unpolluted. Lichens are highly sensitive to air pollution, including sulfur dioxide (SO2) and other pollutants. When lichens thrive on trees and other surfaces, it suggests that the atmosphere in the area has low levels of air pollutants.
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About Man and His Environment
Ecosystems include biotic and abiotic components, food chains and webs, energy flow, nutrient cycles, populations and ecological relationships. Pollution and conservation cover air, water, soil and noise pollution, their effects on organisms, biodiversity loss, protected areas, sustainable resource use and methods for reducing environmental damage.
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