
The risk of acute leukemia in children living close to heavily used roads has been the focus of recent study. The results of the study show that the incidence of new cases of myeloblastic leukemia (418 of 2,760 cases of leukemia) was 30 percent higher in children in the population whose residence was located within 150 m of heavily used roads, and had a combined length of over 260 m within this radius.
http://www.sciencedaily.com/releases/2015/09/150917125246.htm