" - - - the combustion from switching on your gas stove emits high concentrations of harmful toxins, such as nitrogen dioxide (NO2), and carbon monoxide, and releases tiny airborne particle matter called PM2.5 — a major source of indoor pollution and known lung irritants, says Wynne Armand, M.D., an associate director at MGH Center for the Environment and Health and professor at Harvard Medical School. (You’re probably familiar with PM2.5 particulate matter because of all the press it got over the summer during the Canadian wildfires that, at times, engulfed much of the United States in unhealthy air quality conditions, and exacerbated problems for those with respiratory issues, like asthma.)
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