Outdoor air pollution, especially ozone and particulate matter, can increase asthma symptoms. Ways to limit exposure to outdoor air pollution.
Monitor air quality and pollen levels and keep children indoors when pollutants are high.
Avoid sustained contact with vehicle exhaust emissions and diesel fumes (such as student exposure to idling school buses).
Use HEPA filters in household vents.
If possible, move to a less polluted location.
Schedule outdoor activities for times when ozone levels are lowest, typically in the morning