A Review of Toxicity Mechanism Studies of Electronic Cigarettes on Respiratory System Smoking vs Vaping Which Is Worse? Disposable vapes are more toxic than cigarettes, contain lead: Study Most young users put disposable e cigarettes in trash, creating huge streams of toxic and hazardous waste, as companies fail to take responsibility While vaping is not risk free, it is less harmful than tobacco Our World in Data Vaping Safety, Smoking, Dangers, Pros, Cons, Debate, E cigarettes, & Tobacco Britannica