There IS tar and nicotine in all cigarettes manufactured from major cigarrette companies and regulated by our government. Ordinary wild tobacco leaves do not have this tar. The tobacco the native americans smoked didnt have tar either.

your better off growing your own tobacco and rolling it up in rice paper (as suggested before) than buying a pack of cigarrettes over the counter.

Personally, I don't think breathing any type of smoke is good for the lungs-- and would much prefer to drink tobacco in the form of a tea if possible. Probably would get all the same positive health effects without the lung irritation.