The dust in my house that collects on the Kitchen Counter Tops, tables, TV, windowsills and on those picture frames that are so hard to get clean is made mostly from dead human skin cells. In other words, your house is filled with former bits of yourself along with everyone else who has lived in your home.
This then collects in your air ducts and is recycled every time your system runs. In one year, you'll shed more than 8 pounds (3.6 kilograms) of dead skin. It gets even grosser: Your house is also filled with trillions of microscopic life forms called dust mites that eat your old dead skin.
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