Vaping Harmless. Vape aerosol contains toxic chemicals like formaldehyde, arsenic, lead, chromium, and nickel. They damage lungs. They harm developing brains. They raise cancer risks. We Yorkshire Smokefree Disposable Vapes Ban Highlights Urgent Need for Safe Recycling The dark side of disposable e cigarettes Tobacco and Public Health The devices, popular among teens, emit lead, nickel and antimony at concentrations that may exceed cancer and neurological risk thresholds.