Diesel particle pollution inside urban school buses may be worse than levels found in the surrounding roadway air, according to a study by scientists at the University of California. The report appears in the April 15 issue of the American Chemical Societys journal Environmental Science & Technology. ACS is the worlds largest scientific society.
It has generally been assumed that other vehicles on the road are the source of elevated particle levels. But a study of school buses in the Los Angeles area shows that much of the pollution inside a school bus comes from the bus itself, and children on board may be inhaling more diesel particles than previously believed.
Diesel particles are extremely small and can deposit deep in the lungs, whereas larger particles are filtered out by the nose, mouth and throat. A number of studies have linked diesel particles to adverse health effects. For example, a large assessment of air pollution in the Los Angeles area found that diesel particles are responsible for most of the cancer risk from outdoor air pollution.
Michael Bernstein | EurekAlert!
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