What are the sources of indoor air pollutants in buildings?
There are many sources of indoor air contaminants. Some are brought by the building’s occupants. Humans exhale carbon dioxide. New building materials can contribute to the presence of volatile organic chemicals (carpet, wallpaper, glues, particle board, furniture, etc). Radon naturally occurs in the subsoil and may migrate into the building. Lead is ubiquitous, appearing in the dust matrix as a result of previous lead-based gasoline and paint use. Molds and mites may grow when they are supported by high humidity and nutrient sources.
