The average house accumulates around 40 lbs of dust a year, composed of tiny particles of rock, topsoil, sand, sawdust, carbon from smoke and, believe it or not, ash from comets and volcanoes. Also, clothing fibres, carpet/curtain/ furniture/bedding fibres, ickle teddy bear hairs, flakes of skin, mould spores, pollen, bits of plants,   insects, and pet and human hair! Yum ... The contents of your house dust will vary from that of somebody living in a different place from you ... Dust can be evil: it destroys carpet fibres, cuts the efficiency of many household appliances, can cause sneezing, coughing, headaches etc, spread bacteria and viral infections, and can combine with airborne grease to form a sticky film which is hard to get off! GG

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