Toxic metal, leached from e cigarette coil, permanently scars woman's lung Vapes are harmful and can be highly addictive. Some disposable vapes have nearly tripled in nicotine strength in the span of only 5 years. Vaping Marijuana Has Stronger Effects Than Smoking, Study Finds CardioSmart American College of Cardiology POLITICO Harvard poll: Despite vaping crisis, Americans view e cigarettes as far more dangerous than marijuana POLITICO Marijuana legalization: Vaping THC illnesses are strengthening the case for it Vox Flavored marijuana vapes becoming new face of teen drug use, sparking addiction fears