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Indoor-air pollutants come in two primary forms: particle pollution, such as dust, pollen, animal dander and smoke, and gaseous pollutants such as VOCs that are emitted from sources such as building materials, dry-cleaned clothing and aerosol sprays

[DOI] [PubMed] [Google Scholar] 46.Xian S., Chen Y

To be certified, an air cleaner must pass electrical safety tests and, for electronic cleaners, must not produce ozone greater than 0.050 parts per million (50 ppb)

Grow on...You know it makes sense

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In the Costco parking lot last month, I saw someone get out of his car, drop a cigarette on the ground and stomp it out