Vaping a form of tobacco free smoking is, for some, a breath of sweet air What you're watching isn't smoke it's particulate matter size 2.5 microns (PM2.5). One vape exhale took indoor air from 2 500 in seconds. That's because vaping creates ultrafine particles Science & Tech Spotlight: E cigarettes U.S. GAO A viral simulation comparing the effects of smoking and vaping has reignited debate over the long term health risks of both habits. The demonstration visually shows how cigarette smoke leaves thick tar buildup Sobering simulation shows what really happens to your body when you inhale smoke from a vape DoD to Military Members, Dependents: Steer Clear of Vaping