Disposable e cigarettes more toxic than traditional cigarettes EurekAlert! PDF) Impacts of vaping and marijuana use on airway health as determined by exhaled breath condensate (EBC) Vapes Clouds Contain Absolutely Horrifying Chemicals, Scientists Find They may look harmless and smell sweet but disposable vapes can release toxic metals at levels even worse than cigarettes. A UC Davis study found lead, nickel, and antimony inside