Many teachers in Pleasanton public schools use a device in the classroom that emits a chemical fragrance. If you go to the Environmental Protection Agency website, you will discover that these chemical fragrances are respiratory irritants. They may trigger headaches, asthma attacks, and irritate the nose and throat.
They are a source of indoor air pollution. They may smell nice to some people, but they are air pollutants. Their use is not advised, particularly around children.