The Impact of E Cigarettes and Asthma: What You Need to Know Vaping Weed: A Guide For The Health Conscious Pothead Guidance for Secondhand Marijuana Smoke in Multi Unit Housing American Nonsmokers' Rights Foundation no smoke.org How I Can Tell When Dry Herb Is Done in My Vaporizer Vaping360 Don't Use Bootleg or Street Vaping Products, C.D.C. Warns The New York Times How to use a vape pen: Tips on getting the most out of a marijuana vaporizer The Denver Post