A new study from UC Davis found that disposable vapes have much higher concentrations of heavy metals like lead and nickel than traditional cigarettes. CBS Evening News Facebook Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times One million people in England vape despite never having smoked regularly, study finds Vaping The Guardian Why are disposable vapes so popular? Allen Carr's Easyway Study Finds Powerful Sweetener in Vapes Marketed to Teens Powers Health