Question

lichen are indicator of pollution is​

Answer 1

LICHENS AS AN INDICATOR

Answer:lichens change their colour whe exposed to strong pollution...

Explanation:

We can see the trees on roads such as mainroads....the lichens facing road are different from lichen on other side of tree..

Answer 2

Answer:

Lichens as Pollution Indicators. Many lichens show varying degrees of sensitivity to man-made pollutants such as sulphur dioxide, scientists have learned to use this variability as an indicator of the air quality of any given site.