That "Eat My Dust" bumper sticker on the car in front of you may be closer to the truth than you realized. Research by scientists at the California Institute of Technology shows that road dust kicked up by passing traffic can be a source of airborne allergens.
The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.
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American Chemical Society. "Road Dust - Something To Sneeze About." ScienceDaily. ScienceDaily, 30 November 1999. <www.sciencedaily.com/releases/1999/11/991130062843.htm>.
American Chemical Society. (1999, November 30). Road Dust - Something To Sneeze About. ScienceDaily. Retrieved March 11, 2014 from www.sciencedaily.com/releases/1999/11/991130062843.htm
American Chemical Society. "Road Dust - Something To Sneeze About." ScienceDaily. www.sciencedaily.com/releases/1999/11/991130062843.htm (accessed March 11, 2014).