This article from the U.S. tells about what you might find in the dust in your house. The composition may be slightly different in this country but the basics will remain the same. It makes quite interesting reading. "It's hard to get too worked up about dust. Yes, it's a nuisance, but it's hardly one that causes us much anxiety and our language itself suggests as much. We call those clumps of the stuff under the bed dust bunnies after all, not, say, dust vermin. To read the whole article, please click here.