American Cancer Society : Number of smoke - free colleges is growing . Nearly 60 U.S. colleges have smoke - free policies that affect entire campus . When you walk out , you do n't see cigarette butts littered around . Cancer society : Has cancer prevalence highest among adults aged 18 - 24 .
American Cancer Society : Number of smoke - free colleges is growing . Nearly 60 U.S. colleges have smoke - free policies that affect entire campus . Cancer society : Has cancer prevalence highest among adults aged 18 - 24 .