|Vehicular air pollution could cause autism - Photo by Sarah Stephen|
The researchers used Los Angeles as a sample population. Mothers of over 7600 children between ages of 3-5, diagnosed with autism during 1998-2009, were identified and their addresses at the time of pregnancy established. For each case, 10 controls were used in the analysis, and the addresses of the mothers were linked with air monitoring stations in the vicinity. The researchers then used using data from air monitoring stations and a land use regression (LUR) model to estimate exposures and came to the conclusion that ambient air pollution is linked to autism. Though LA is much cleaner than it used to be, it frequently has the highest levels of ozone within the country. According to the authors, theirs is the first study to show a link between autism and ozone.
Becerra, T., Wilhelm, M., Olsen, J., Cockburn, M., & Ritz, B. (2012). Ambient Air Pollution and Autism in Los Angeles County, California Environmental Health Perspectives DOI: 10.1289/ehp.1205827
Windham, G., Zhang, L., Gunier, R., Croen, L., & Grether, J. (2006). Autism Spectrum Disorders in Relation to Distribution of Hazardous Air Pollutants in the San Francisco Bay Area Environmental Health Perspectives, 114 (9), 1438-1444 DOI: 10.1289/ehp.9120