The U.S. experienced indoor air quality worse than outdoor for three quarters of 2022, January 11, 2024: “Today, Dyson unveils the results of its first Global Connected Air Quality Data project. The project analyzes indoor air quality information collected by more than 2.5 million Dyson purifiers from 2022 to 2023 to landscape air quality in real homes across the world, to a high degree of granularity, breaking down pollution into gas and particle pollutants, and profiling trends over days, months, seasons and the full year. The data comes from Dyson purifiers connected to the MyDyson app; the volume of data exceeds half a trillion data points and paints a precise picture of indoor air quality in cities and countries globally to he.lp build understanding and awareness of indoor air pollution. From a wealth of data, this project focuses on two types of pollutant – PM2.5, and Volatile Organic Compounds (VOCs). PM2.5 refers to particles as small as 2.5 microns in diameter, 1/25th the diameter of a typical human hair. These particles are invisible to the naked eye, can be inhaled and are an area of increasing scientific and health research. Sources include combustion, – wood burners, or gas cooking and heating – pet dander, ash and dust. VOCs are gas pollutants including Benzene and Formaldehyde which can be emitted from activities like cleaning or gas cooking as well as from products including deodorants and body sprays, candles, furniture and furnishings.”