An e-cigarette is a device that converts liquid nicotine into a vapor or mist, that the user inhales. They are battery-powered devices and do not generate ash, fire, or cause the smoky smell. These cigarettes do not contain harmful chemicals such as carbon monoxide and tar that are associated with smoking tobacco cigarettes.
Hon Lik, a Chinese pharmacist, invented the electronic cigarette and patented the device in 2003. The following year, he introduced it to the Chinese market. Many companies are now selling them to customers around the world. Though e-cigarette smoking (also sometimes called vaping) has grown in popularity, some are concerned about its safety, including the possibility that the vapor generated by the devices contains dangerous chemicals.
More information on the working of an electronic cigarette.
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