Updated Oct. 21, 2017
*Air pollution is associated with higher rates of breast, lung, prostate, cervical, brain, nasal, pharyngeal, liver and stomach cancer, and childhood leukemia. Pre-natal pollution exposure is associated with increased rates of multiple childhood cancers. Air pollution is associated with decreased survival in breast and liver cancer patients. The World Health Organization has declared air pollution the most important environmental cause of cancer, more important that second hand cigarette smoke. The WHO placed it in the same category as asbestos and ionizing radiation.