<unk>  is the involuntary inhalation of smoke from tobacco products. It occurs when tobacco smoke permeates any environment, causing inhalation by all people within that environment. Such smoke is called secondhand smoke or environmental tobacco smoke (ETS). Current scientific evidence shows that exposure to secondhand tobacco smoke causes death, disease, and disability.<unk>  is one of the key issues leading to smoking bans in workplaces and indoor public places, including restaurants, bars and night clubs.
Passive smoking
Sedentary lifestyle
Smoking
Shift work
Obesity
Maternal deprivation
Ethnic group
Ageing