Word: beamer
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...There are more [components]," Beamer says. "Dust is a hodgepodge of all sorts of things. It would probably be impossible to make a list of all the possible items...
...dust's ingredient label is not the whole story, since all of those flecks and bits behave differently and present different levels of health risk. To investigate those factors more closely, Layton and Beamer developed a computer algorithm that looked at the size, source and toxicity of dust particles as well as how easily they enter the house, if they ever exit and, if so, by what route. That information, by extension, can provide at least a rough sense of the dust load in your own home. (See TIME's special report "How to Live 100 Years...
...Here in Arizona," says Beamer, "where we leave our windows open most of the year and have an arid climate, we would probably have a higher ratio." Industrial centers or sooty cities have plenty of dust too, though for different reasons...
...things from their hands to their mouths. The same is true for lead, which comes less from wall paint - the source most people would expect - than from auto exhaust, smelting and soil deposits. "Lead loading on floors is a key determinant of blood-lead levels in children," Layton and Beamer wrote in their paper. (See "The Year in Health 2009: From...
...that DDT is still in house dust is a surprise to most people, since the pesticide was banned in the U.S. in 1972. But a house is a little like a living organism: once it absorbs a contaminant, it may never purge it completely. "Dust in our homes," says Beamer, "especially deep dust in our carpets and furniture, is a conglomerate of substances over the life of the home and can provide a historical record of chemicals that have entered...