Growing Evidence for the Role of Air Pollution in Breast Cancer Development.

In the article that accompanies this editorial, Wu et al., observed that residential exposure to fine particulate matter was associated with higher breast cancer incidence using prospective data from over 58,000 California women in the Multiethnic Cohort Study. These findings, together with a meta-analysis of findings from cohort studies included in the manuscript, highlight the importance of environmental contributors to breast cancer risk.