Vaping weed is popular, but there are many unknowns about its safety : NPR Why Vaping Cannabis Feels So Different (And Sometimes Scarier) Get Canna Card Alaska Marijuana Control Board Approves On Site Smoking Vaping Rules American Nonsmokers' Rights Foundation no smoke.org Smoking vs. Vaping Weed: Know the Facts Hackensack Meridian Health Young Adults Commonly Mix Cannabis With Nicotine and Tobacco Columbia University Mailman School of Public Health Don't Use Bootleg or Street Vaping Products, C.D.C. Warns The New York Times