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 .
American Cancer Society : Trend of smoke-free colleges is growing . Nearly 60 U.S. colleges have smoke-free policies that affect entire campus . Cancer society : U.S. smoking prevalence highest among people ages 18-24 .