Washington: Exposure in infancy to nitrogen dioxide (NO2), a component of motor vehicle air pollution, has been found to be strongly associated with later development of childhood asthma, according to a team led by UCSF scientists.The researchers said their findings indicate that air pollution might, in fact, be a cause of the disease.In the study, the largest to date of air pollution exposure and asthma risk in minority children in the United States, the team found that for every five parts per billion increase in NO2 exposure during the first year of life, there was a 17 percent increase in the risk of developing asthma later in life.The study involved 3,343 Latino and 977 African American participants.
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