SO2 pollution is indicated by

Question

SO2 pollution is indicated by (A) grasses (B) mosses (C) lichens (D) fossils

Tardigrade Admin · Accepted Answer

Lichens are good indicators of air pollution as these are very sensitive to

S O_{2}

. Pollution of

S O_{2}

causes intense irritation to eyes and respiratory tract. It is absorbed in the moist passage of upper respiratory tract, leading to swelling and stimulated mucus secretion.

S O_{2}

causes damage to higher plants, forming necrotic areas on leaf. Plants are more sensitive to

S O_{2}

pollution. Higher concentration of

S O_{2}

in air reduces the

p H

of leaf tissues of some trees, increasing the total sulphur content of leaves and tree bark. It affects stomatal pores, stomatal frequency and trichomes as well as chloroplast structure.

Q. SO2​ pollution is indicated by

grasses

mosses

lichens

fossils

Q. $S O_{2}$ pollution is indicated by