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In the Spotlight

March 14, 2000

Secondhand Smoke: How Dangerous Is It?

 
Read More about Smoking:
Stop Smoking Center
Pulmonary Center

Can you answer these questions?

  • What is secondhand smoke?
  • How does secondhand smoke affect health?
  • What are the risks of secondhand smoke to children?
  • What can you do to reduce your risks to secondhand smoke?
  • How can you make your home smoke-free?

Read on to find the answers.

Secondhand smoke

Secondhand smoke, also known as environmental tobacco smoke (ETS) is a mixture of the smoke given off by the burning end of a cigarette, pipe, or cigar, and the smoke exhaled from the lungs of smokers. This mixture contains more than 4,000 substances, more than 40 of which are known to cause cancer in humans or animals and many of which are strong irritants. Exposure to secondhand smoke is called involuntary smoking, or passive smoking.

Secondhand smoke has been classified by the U.S. Environmental Protection Agency (EPA) as a known cause of lung cancer in humans (Group A carcinogen). The EPA estimates that secondhand smoking causes approximately 3,000 lung cancer deaths in nonsmokers each year.

Secondhand smoke in the home

We spend more time in our homes than anywhere else. So the thought of cancer-causing chemicals circulating throughout our houses and apartments can be quite unsettling. Yet, according to the Environmental Protection Agency (EPA), that is exactly what happens when someone lights a cigarette in your home.

Those most affected by secondhand smoke are children. Because their bodies are still developing, exposure to the poisons in secondhand smoke puts children in danger of severe respiratory diseases and can hinder the growth of their lungs. On top of that, the effects can last a lifetime.

The EPA estimates that passive smoking is responsible for between 150,000 and 300,000 lower respiratory tract infections in infants and children under 18 months of age annually, resulting in between 7,500 and 15,000 hospitalizations each year. Children exposed to secondhand smoke are also more likely to have reduced lung function and symptoms of respiratory irritation like cough, excess phlegm, and wheeze.

Passive smoking can lead to buildup of fluid in the middle ear, the most common cause of hospitalization of children for an operation. Children with asthma are especially at risk. The EPA estimates that exposure to secondhand smoke increases the number of episodes and severity of symptoms in hundreds of thousands of children with asthma. Passive smoking may also cause thousands of non-asthmatic children to develop the condition each year.

How to reduce the risk

Do not smoke in your home or permit others to do so.

If a family member insists on smoking indoors, increase ventilation in the area where smoking takes place. Open windows or use exhaust fans. Do not smoke if children are present, particularly infants and toddlers. They are particularly susceptible to the effects of passive smoking.

However, ventilation systems in homes cannot filter and circulate air well enough to eliminate secondhand smoke. Blowing smoke away from children, going into another room to smoke, or opening a window may help reduce children's exposure but will not protect them from the dangers of secondhand smoke.

Benefits of a smoke-free home

The greatest benefit, of course, is that you will remove all the health risks associated with secondhand tobacco smoke. Plus:

  • When your home is smoke-free, it will smell much better.
  • Your food will taste better.
  • You'll spend less time, energy, and money cleaning your curtains, walls, windows, and mirrors.
  • Your insurance rates may be lower--check with your insurance company.
  • Even your pets will be happier. For example, secondhand smoke increases the risk of lung cancer in dogs.

How to make (and keep) your home smoke-free

It may feel awkward at first to tell people not to smoke in your home--no one wants to make guests uncomfortable--but if you simply explain the facts about secondhand smoke, they should understand completely.

Tell them that for the sake of your family's health, you simply cannot allow smoking in your home. Have gum or mints available as an alternative to lighting up. If visitors absolutely must smoke, tell them they can do so outside.

If someone in your household smokes, be sympathetic and understanding--but encourage him or her to quit. Let that person know that cigarette smoke affects everyone, not just the smoker. Let them know you care and you want to help. Again, if someone absolutely must smoke, ask that person to do so outside.

Don't forget schools and day care

Make sure your child's school and day care programs are smoke-free. And insist that baby-sitters not smoke around your children.

Adapted from: Office on Smoking and Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention http://www.cdc.gov/tobacco

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