< Back to All Videos thirdAGE > Smog and Breast Cancer Risk Up Next... 10 Exercise and Mortality Exercise and Mortality Insurance Coverage & Breast Cancer Diagnosis Breast Cancer and Weight Loading the player ... Cancer Women's Health Smog and Breast Cancer Risk Air pollution may increase a woman’s risk of dense breasts, study finds. Related Videos Exercise and Mortality Insurance Coverage & Breast Cancer Diagnosis Breast Cancer and Weight Medications and the Sun Share this: