Changes

Passive [[smoking]], or second-hand smoking, is the inhaling of [[tobacco]] fumes exhaled by other smokers. It has been shown to cause lung cancer and is the reason for the smoking ban in many public areas

Passive [[smoking]], or second-hand smoking, is the inhaling of [[tobacco]] fumes exhaled by other smokers. It has been shown to cause lung cancer and is the reason for the smoking ban in many public areas.