It is also posted on Webmd, among other sites. Though any way you look at it,
second hand smoke and
smoking in general is very unhealthy. Plus, those who have parents who smoke are more likely to smoke themselves(statistically speaking), which is more of a reason for parents to just quit smoking all-together. I personally can't stand the smell of smoke and have slight asthma, so it makes it difficult for me to breathe if I am around a smoker.