New research –> Traffic related air pollution may increase allergy severity and frequency

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.
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.

Air pollutants could boost potency of common airborne allergens