Vapes Clouds Contain Absolutely Horrifying Chemicals, Scientists Find UC Davis study reveals higher toxicity in disposable e cigarettes Elevated Toxic Element Emissions from Popular Disposable E Cigarettes: Sources, Life Cycle, and Health Risks ACS Central Science Are e cigarettes really a safer alternative to combustible cigarettes? New study reveals disposable vapes may be more toxic! Learn more about how a University of California, Davis study found that some popular 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