Nonsmoking persons living with heavy smokers have four times the risk of heart attack than those who live in smoke-free homes. Risk of developing cancer from other people's smoke is 57 times greater than the total risk of all outdoor air contaminants regulated under environmental laws. Separating smokers and nonsmokers in the same air space may reduce but does not eliminate nonsmokers' exposure. Smokers influence others to smoke. Eighty percent of smoking adolescents have a close friend who smokes.
Parental smoking tends to establish smoking as normative behavior for children.
The Scriptures enjoin believers to do nothing that would cause fellow believers to stumble.