Since their introduction in Europe in 2006 and the U.S. in 2007, the use of e cigarettes a.k.a., vapes has skyrocketed. A recent review from researchers in Australia found the results Chemical Composition of Aerosols of an Electronic Cigarette Aerosol and Air Quality Research New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking E liquide cigarette elecronique sans propylene glycol Vegetol Pure