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The Dangers of Secondhand Smoke

Secondhand smoke is a toxic by-product of smoking tobacco which affects anyone who is exposed to it. Otherwise known as environmental tobacco smoke(ETS), find out why it is harmful, who is most at risk from exposure, and what you can do to protect yourself and loved ones from it.
Secondhand Smoke Facts
Secondhand smoke is defined as the smoke which is exhaled by the smoker plus the smoke created by the smouldering of a lit cigarette. Secondhand smoke is full of toxins, and is dangerous to anyone who breathes it in.
Secondhand Smoke and Children
Children face a higher risk than adults of the negative effects of secondhand smoke, also known as ETS. Not only is a child's body still developing physically, but their breathing rate is faster than that of adults.
Secondhand Smoke at Home Threatens Our Children's Health
Secondhand smoke is a toxic cocktail of poisons and carcinogens, and more people than ever before believe this to be true. However, according to Robert McMillen, MD, many parents still expose their children to secondhand smoke at home on a regular basis.
Carcinogens from Tobacco Smoke Found In Babies Urine
Researchers have discovered the presence of cancer-causing chemicals in the urine of babies who breathe in environmental tobacco smoke (ETS).
Secondhand Smoke Poll Questions
Do you think secondhand smoke poses a serious health risk? Weigh in on this and other issues related to secondhand smoke, and see what others think.
Stay Away From Secondhand Smoke
From About.com Guide to Pediatrics, Vince Ianelli: "Children who breathe in secondhand smoke are more likely than other children to get sick. They may have more mucus. The fluid in their middle ears may build up and cause ear infections."
Hydrogen Cyanide in Secondhand Smoke
One of the toxic byproducts of cigarette smoke is hydrogen cyanide. Smokers inhale it with every puff they take. This same chemical was used as a genocidal agent during World War II.
Carbon Monoxide in Cigarette Smoke
Cigarette smoke can contain high levels of CO, as well as 200 other known poisons.
Formaldehyde in Second Hand Smoke
Formaldehyde is present in cigarette smoke as well as building materials and household products. Learn what physical symptoms to expect from formaldehyde, and what you can do to limit exposure to it.
Environmental Tobacco Smoke (ETS)
Environmental tobacco smoke, or ETS, is defined as the combination of diluted sidestream smoke and mainstream smoke.
What is Passive Smoking?
Passive smoking is defined as the involuntary inhalation by a nonsmoker of a combination of diluted sidestream smoke and mainstream smoke.
Mainstream Smoke
Mainstream smoke is defined as cigarette (tobacco) smoke which is emitted through a person's mouth after inhaling it.
Passive Smoking and the Risk of Breast Cancer
Premenopausal women who are exposed to second hand smoke on a regular basis have an increased risk of breast cancer, similar to that of women who actively smoke.
What is Sidestream Smoke?
Sidestream smoke is created from the emissions of a smoldering cigarette.
Secondhand Smoke Toolkit
The CDC online toolkit helps you understand what secondhand smoke is and the dangers it poses. Also learn how to reduce the threat in your home and public places.
Second Hand Smoke: The Preventable Health Risk
Take a look at how secondhand smoke affects nonsmoking adults and children. This report from the EPA opens our eyes to the dangers for those exposed to this toxic byproduct of smoking.

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