(Environment International) Findings suggest that childhood exposure to indoor air pollution, much of which penetrated readily from outdoor sources, may contribute to the development of wheeze symptoms among children ages 5 to 7 years.
Jung, K. H., Hsu, S. I., Yan, B., Moors, K., Chillrud, S. N., Ross, J., Wang, S., Perzanowski, M. S., Kinney, P. L., Whyatt, R. M., Perera, F. P., & Miller, R. L. (2012). Childhood exposure to fine particulate matter and black carbon and the development of new wheeze between ages 5 and 7 in an urban prospective cohort. Environment International, 45, 44–50. https://doi.org/10.1016/j.envint.2012.03.012