Monday afternoon vs. Wednesday afternoon in NYC as Canadian wildfire smoke chokes the city. 📷 EarthCam
Choose air purifiers that have a clean air delivery rate — a metric of how effective they are at removing pollutants — of at least two-thirds the size of the room they are intended for, experts say.
Pollutants can come from indoor sources, too, said Dr. Peter Moschovis, a pulmonologist and critical care physician at Massachusetts General Hospital and an assistant professor at Harvard Medical School. Symptoms may also worsen depending on what’s burning. If a person is sensitive to an environmental allergen, such as trees or grass, breathing in the smoke that results from burning that allergen may cause a reaction.
"Pennsylvania residents should limit their outdoor activities, especially older people, children, those who are active outdoors, and those with lung or respiratory conditions such as asthma, emphysema, or bronchitis," it said in a tweet.
People should keep their pets indoors as much as possible, said Brady Scott, a fellow at the American Association for Respiratory Care.
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