The pollutants chlorofluorocarbons are major source of air pollution contributed by:
Name one source and one harmful effect of each of the following air pollutants :
(a) Sulphur dioxide
(b) Nitrogen oxides
(c) Carbon monoxide
(d) Chlorofluorocarbons (CFCs)
What are chlorofluorocarbons? Why are they considered as air pollutants?