As vaping grows more popular, especially among teens, here are answers to some basic questions about its health effects. [...] E-cigarettes contain far fewer dangerous chemicals than those released in burning tobacco. Tobacco cigarettes typically contain 7,000 chemicals, including nearly 70 known to be carcinogenic. E-cigarettes also don’t release tar, the tobacco residue that damages lungs but also contributes to the flavor of tobacco products.
EU e-Privacy Directive