Electronic cigarettes compose of battery-powered heating elements that heat e-liquids in vape cartridges to vaporize it for the user to inhale. But, unlike traditional smoke-emitting cigarettes, vapes don’t produce smoke — they emit an aerosol cloud containing small particles, nicotine, and other compounds. There is ongoing research on the effects of vaping and second-hand vape clouds. Here is a discussion on whether second-hand vaping is dangerous to your health.