11.   But there was no dust to settle.

12.   Creosote dust is corrosive and it can damage the appliance.

13.   Dust is a byproduct of combustion.

14.   Dust is a melange of fibers from plants, fabric and humans.

15.   Dust was so thick on an anesthesia machine, an employee wrote his initials in it.

16.   Dust can be deadly.

17.   Dust is gone.

18.   Dust is not a problem, and the Haitians have elected leaders, running water and separate areas for families and single people.

19.   Dust is every where.

20.   Dust is fine bits of matter that are capable of floating in the air.