Which of the following is the best parameter to measure air pollution?: (A) SO2, (B) CO2, (C) CO, (D) N20
Answer is A. The best indicators of air pollution are sulphur dioxide (SO2), smoke and suspended paicles. These are monitored on a daily basis over several sites. The results are then collected by a central agency. Methods for monitoring air pollution: Sulphur dioxide Smoke or Soiling index Grit and dust measurement Coefficient of haze Air pollution index Ref: Park's Textbook of Social and Preventive Medicine, 19th edition, Page 593.