Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times First, Second and Thirdhand Smoke: The Differences and Dangers Tobacco Stops With Me 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