Some reliable indicators of air pollutants (SO2 and noxious gases) are:? Pollution Mcqs December 16, 2019 BILAL KHATTAK0 A.Ferns and Cycas B.Green algae and aquatic liverworts C.Lichens and mossesD.Neem’ tree and Eichhorniaundefined Related Mcqs: Which of the following is not a primary coloniser? If the top soil has been eroded, we retire a land and grow over it: True nucleus is not present in: Of the following which one is not the characteristic of green algae?? The earliest settlers on barren lands generally are: The first plants to reappear in a badly burnt forest area will most probably be:? Nitrogen fixation is done by: BOD of polluted water is increased by? Which one of the following statement is correct? The biological weathering commonly brought about by:?