Reply #14: While I belive that there is no totally "risk free" exposure to 2nd hand smoke

[panader0]

I wonder what the actual degree is, compared to the actual smoker. Say a smoker is in a room 20 ft. by 20 ft., and dragging hard on a cigarette. Is a person sitting across the room getting the same exposure as the smoker? Or is the smoke diluted, and to what degree? Any tests on this? I smoke about a pack a week, never at home, and never in my friends vehicles, only outdoors, or in my band shed.