Why does dust appear in a room completely closed? Where does the dust come from?
Meteorologists tell us in South Florida that our dust blows in from the Sahara on the tradewinds, and that it is so fine that it comes in through any crack or opening large enough for air to flow through. I usually have to dust black surfaces daily, and grey or white surfaces weekly. I try to keep black surfaces to a minimum. The ceiling fans are a nightmare.
Dust in homes, offices, and other human environments is mainly generated by the inhabitants (especially domesticated pets such as dogs, cats and birds), and mainly from their skin cells that slough off[1]. Some atmospheric dust from the outdoors is also present[2]. On average, approximately 6 mg/m3/day[3] of house dust is formed in private households, depending primarily on the amount of time spent at home. “Dust bunnies” are little clumps of fluff that form when sufficient dust accumulates. Dust is also referred to as “fluff” and is known to worsen hayfever. Insects and other small fauna found in houses have their own subtle interactions with dust that may have adverse impact on the health of its http://en.wikipedia.
