Passive smoking is a threat to public health. Secondhand exposure to tobacco smoke may cause heart disease and lung cancer in non-smoking adults and sudden infant death syndrome, acute respiratory infections, middle ear disease, exacerbated asthma, respiratory symptoms and decreased lung function in children.1,2 However, the knowledge and actions of non-smoking women against environmental tobacco smoke, especially in public spaces, may not have been adequately emphasized to pregnant women and mothers of young children. Therefore, a need emerges for intervention programmes designed to protect non-smoking women and children from the health hazards of passive smoking