Focused on the Facts: Secondhand Marijuana Smoke American Nonsmokers' Rights Foundation no smoke.org Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Myth Buster ~ "Second hand vape smoke" is actually water vapour and is not harmful to other people or the environment. #vape #vaping #vapeuk #ecigerette #smoke #quit Secondhand smoke and secondhand aerosol Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek