What is secondhand smoke exposure?

Answer 1

Third hand smoke is the remainders of someone who smokes that lingers in hair, carpets, and most things made of cloth. This is not the same as second hand smoke. This can effect small children as they breathe, touch, or play on surfaces that may be affected.

Answer 2

When you are sitting in a room and you're (willingly or unwillingly) inhaling the smoke from a pipe/cigarette/joint without actually smoking it yourself.