human
I've been hearing a lot about the dangers of e-cigarettes. What are they and should I be concerned about them?
assistant
E-cigarettes are battery-powered devices that use a cartridge filled with nicotine, propylene glycol, glycerin, and flavorings to create an aerosol that users inhale. They are designed to simulate smoking by delivering nicotine in a similar way to cigarettes, but without the harmful chemicals associated with traditional cigarettes. However, there is still some uncertainty as to whether or not these products are safe for long-term use due to their potential health effects. The World Health Organization has warned against their use until more research can be conducted on their safety.