A toxic, plastic problem: E cigarette waste and the environment Vaping exposes users to toxic metals like lead and uranium, study says AOL UC Davis study: Disposable vapes may be more toxic than cigarettes Scientists astonished by highly toxic feature found in popular vape products: 'So high I thought our instrument was broken' Most young users put disposable e cigarettes in trash, creating huge streams of toxic and hazardous waste, as companies fail to take responsibility Disposable vapes might look harmless with their fun colors and sweet flavors, but scientists have just uncovered a disturbing truth: these devices can pack a toxic punch even stronger than regular cigarettes.