E cigarettes contain hazardous substances, addictive and harmful Vaping Dangers: Slideshow, Notes + Activities: E Cigarettes, Nicotine, Addiction Vaping, Popcorn Lung, and Cancer: Unmasking the Hidden Dangers of E Cigarettes Helix Biopharma Vaping Safety, Smoking, Dangers, Pros, Cons, Debate, E cigarettes, & Tobacco Britannica Health Effects of Vaping Smoking and Tobacco Use CDC Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center