Less Pollution on City Sidewalks than Streets
"Pedestrians and bicyclists, meanwhile, were exposed to counts of just 5,000 and 8,000, respectively."
Bjorn Carey
LiveScience Staff Writer
LiveScience.com
Mon Jan 16, 1:00 PM ET
<a href="http://news.yahoo.com/s/space/20060116/sc_space/lesspollutiononcitysidewalksthanstreets">http://news.yahoo.com/s/space/20060116/sc_space/lesspollutiononcitysidewalksthanstreets</a>
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