Feature Earth Air Sickness How microscopic dust particles cause subtle but serious harm Share this:FacebookTwitterPocketRedditPrintEmail By Janet Raloff July 28, 2003 at 12:04 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe