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Triggers Outdoors

Pollution from a car can trigger asthma.

Pollution caused by industrial emissions and automobile exhaust can cause an asthma attack. Pay attention to air quality forecasts on radio, television, and Internet and if air pollution aggravates your asthma, plan your activities for times when air pollution levels will be low.


CDC’s National Center for Environmental Health

Our people at the National Center for Environmental Health are working to prevent illness, disability, and death from interactions between people and the environment.


U. S. Environmental Protection Agency (EPA)

This federal agency informs people about the environment and develops and enforces regulations about the environment. EPA’s mission is to protect human health and the environment. Here you will find information about outdoor air pollution and steps you can take to protect yourself:

  • AIRNow

    This site offers air quality information by state and cities, air quality forecasts and corresponding health effects, ozone maps, air pollution publications, and steps you can take to reduce air pollution.

  • Asthma and Outdoor Air Pollution [PDF - 503 KB]

    This fact sheet provides information for people with asthma on understanding and using outdoor air quality warnings.

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Data & Surveillance

Percents by Age, Sex, and Race, United States, 2012. Age: Child = 9.3%, Adult =  8.0%, Sex: Male = 7.0%, Female =  9.5%, Race/Ethnicity: White =  8.1%, Black =  11.9%, Hispanic =  7%. Source: National Health Interview Survey, National Center for Health Statistics, Centers for Disease Control and Prevention.

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  • Page last reviewed: April 24, 2009
  • Page last updated: April 27, 2009
USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC-INFO