Studies have long shown that children who live near busy roadways have higher rates of hay fever, allergic sensitization, asthmatic bronchitis and eczema, but the reasons have not been clear.
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| Source: NIH |
A study to be presented today at an American Chemical Society meeting in Denver points to one possible pathway – it shows how pollen can be altered and made more harmful by two of the most common traffic related pollutants – nitrogen dioxide and ozone.