Indicator of air pollution are:: (A) Sulphur dioxide, lead, paiculate matter, (B) Carbon dioxide, hydrogen sulphide, lead, (C) Sulphur dioxide, hydrogen sulphide, carbon monoxide, (D) Sulphur dioxide, smoke, paiculate matter
Answer is D. The best indicators of air pollution aresulphur dioxide, smoke and suspended paicles. These are monitored on a daily basis over several sites, results often collected by a central agency. Air pollution indicators are- CO2, CO SO2, NO2 Air pollution index Soiling index Coefficient of haze Suspended paiculate matter