
Second-hand tobacco smoke is dangerous to health. It causes cancer, heart disease and many other serious diseases in adults. Almost half of the world's children breathe air polluted by tobacco smoke, which worsens their asthma conditions and causes dangerous diseases. At least 200 000 workers die every year due to exposure to second-hand smoke at work.
This fact file explains why ensuring a smoke-free environment is the only way to protect ourselves from the lethal ill effects of tobacco smoke.
Source: http://www.who.int/en/