Passive smoking is inhaling of the mixture of gases and particles from a burning cigarette (or other tobacco product) that end up in the surrounding air.
More than half of the smoke (by weight) from a burning cigarette is second hand smoke.
Based on scientific research experts have reached a number of conclusions about the effects of passive smoking on human health. In children and infants, it is a cause of respiratory symptoms and infections, fluid in the middle ear, asthma, reduced lung function (difficulty breathing), sudden infant death syndrome, and low birth weight. In adults, passive smoking is a cause of lung cancer, nasal sinus cancer, asthma, and cardiovascular disease.
Also researches proved that passive smoking was one of the main causes for lung cancer.
The release quoted the World Health Organization indicating that over 5 million people die around the world each year due both active and passive smoking, adding that it is common knowledge that many people innocently or unknowingly become victims of tobacco use by being passive smokers at their places of work, homes or public places.
Research has shown that non-smokers who reside with a smoker have a 24% increase in risk for developing lung cancer when compared with other non-smokers. An estimated 3,000 lung cancer deaths occur each year in the U.S. that are attributable to passive smoking.
Certain people seemed to be predisposed to developing lung cancer, and may be particularly vulnerable to second hand smoke. Non-smoking women and children seem to be more vulnerable to affect of passive smoking and development lung cancer than non-smoking men.
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