Which is used as an Air pollution indicator? A)Algae B)Fungi C)Bacteria D)Lichens
Option D) Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrubby, hairy and leafy lichens become abundant
