Dear aspirant !

Hope you are doing great ! A small difference is there in primary and secondary pollutants that is ,primary pollutants are directly ejected in atmosphere by the natural sources while the secondary pollutants are the results of various chemical reactions which we directly or indirectly do in daily life . The effect of the pollutants is very harmful ,first is , disease like asthma is the result of pollutants . Our less growth ,less death rate compare to other countries ,less plant growth ,mental issues are the results of pollutants.

It may help you!!

Thanking you