By Melissa Breyer, Care2 Green Living
More from Care2 Green Living blog
Dust. It floats lazily through beams of sunlight, it settles gently on surfaces, and it tangles with other mysterious miscellany to create inanimate creatures beneath the couch -- but where does it come from, and is it harmful?
The surprising answer is most indoor dust comes from outdoors, and it's not always all that innocuous. Over 60 percent of house dust originates outdoors, according to a report from scientists in Arizona, "Migration of Contaminated Soil and Airborne Particulates to Indoor Dust," which appeared in the ACS Environmental Science & Technology journal.
In the study, David Layton and Paloma Beamer note that household dust consists of a mixture that includes dead skin shed by people, fibers from carpets and upholstered furniture, and tracked-in soil and airborne particles blown in from outdoors. It can include lead, arsenic and other potentially harmful substances that migrate indoorsRead More »from Where does dust come from?