As I've heard from many credible sources, an hour of vaping is equivalent to 100 cigarettes.
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Credible sources being....?
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Edited by Slepyoneshot: 1/7/2016 2:45:00 PMhttp://www.telegraph.co.uk/journalists/sarah-knapton/11056964/Ban-toxic-e-cigarettes-indoors-says-World-Health-Organisation.html http://www.telegraph.co.uk/women/womens-health/11058158/E-cigarette-WHO-ban-I-thought-vaping-was-safe.html WHO, basically the most credible source for medical issues on Earth http://www.theantdaily.com/Main/So-what-now-To-vape-or-not-to-vape heres an article with 3 different sources