What is the difference of primary smoking and secondary smoking?

Answer 1

The difference between primary and secondary smoking is very simple.

Primary smoking is actually smoking the cigarette yourself, whereas secondary or second hand smoking is inhaling fumes of other smokers around you, whilst you are not actually smoking the cigarette.

That is why the smoking ban was introduced and more and more smokers are smoking in smoking shelters. Which, not only provides shelter for them when they are smoking outside, but it also protects non smokers from the harmful fumes.