Passive smoking causes behavioural problems in children

Children whose mothers smoke during pregnancy -- and even those born into smokers' homes -- are nearly twice as likely to develop behavioural problems, researchers said Tuesday. A study of some 5,200 French primary school children linked exposure to smoking with a range of troubling behaviour such as aggression, disobedience, lying and cheating. "Exposure to tobacco during pregnancy and after birth practically doubles the risk of behaviour problems among primary school children aged on average a