Q. $SO_{2}\$pollution is indicated by
A) $Desmodium\ \ (grasses)$
B) $Sphagnum\ (mosses)$
C) $Usnea\ (lichens)$
D) $Cucurbita\ (climbers)$
Explanation
Lichens (Usnea) are the indicator of air pollution, as these are very sensitive to air pollution (particularly $SO_{2}$pollution).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.