Does Vaping Cause Lung Cancer? Disposable vapes are more toxic than cigarettes, contain lead: Study Vaping: High lead and nickel found in illegal vapes WARNING FOR AND Illegal disposable e cigarettes (vapes) may be more dangerous than traditional cigarettes, according to new research from UC Davis. The study found hazardous levels of toxic heavy metals Yorkshire Smokefree With more vapes getting thrown away every year, it's become a growing environmental problem. Vapes contain heavy metals, nicotine, and other chemicals, which leach toxic pollutants into the soil and waterways when