Presence of SO2 in atmosphere is indicated by:
Correct answer: C. Lichens
- A. Mosses
- B. Liver worts
- C. Lichens
- D. Ferns
Explanation
Lichens are especially sensitive to atmospheric sulphur dioxide, so their disappearance or reduced growth indicates SO2 pollution. Mosses, liverworts and ferns are not the standard indicators used for this purpose.
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