< Back to All Videos thirdAGE > Smog and Breast Cancer Risk Up Next... 10 Pot Use in Adolescence Pot Use in Adolescence Updated Mammography Guidance Exercise and Mortality 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 Pot Use in Adolescence Updated Mammography Guidance Exercise and Mortality Insurance Coverage & Breast Cancer Diagnosis Share this: