E cigarette aerosol isn't just water vaporit contains toxic chemicals like formaldehyde and acrolein (yes, a weed killer!). Vaping can lead to lung disease, Popcorn Lung, and even a collapsed lung. Plus, secondhand E cigs and Vaping: How Are They Impacting Our Youth? Nicotine Vapes: the Chemicals They Contain, What They Can Do to You Business Insider Formaldehyde Is in Vapes & Preserves Dead Frogs No Matter the Taste #VapesDown