Why are disposable vapes so popular? Allen Carr's Easyway Elevated Toxic Element Emissions from Popular Disposable E Cigarettes: Sources, Life Cycle, and Health Risks ACS Central Science Online vape retailers ignore rules protecting minors, study finds Los Angeles Times Metals found in disposable e cigarette vapor could pose health risks American Chemical Society F.D.A. Opens Door to More Flavored E Cigarettes The New York Times