alt=A first-generation e-cigarette that resembles a tobacco cigarette. Also shown is a USB power charger, which the battery portion of the e-cigarette can be disconnected and recharged with. alt=Various types of e-cigarettes, including a disposable e-cigarette, a rechargeable e-cigarette, a medium-size tank device, large-size tank devices, an e-cigar, and an e-pipe. An<unk>  is an<unk>  device that simulates tobacco smoking. It consists of an atomizer, a power source such as a battery, and a container such as a cartridge or tank. Instead of smoke, the user inhales aerosol. As such, using an e-cigarette is often called "vaping". The atomizer is a heating element that atomizes a liquid solution called e-liquid. E-cigarettes are activated by taking a puff or pressing a button. Some look like traditional cigarettes, and most versions are reusable. E-cigarettes create an aerosol, often called vapor, made of particulate matter. The vapor typically contains propylene glycol, glycerin, nicotine, flavors, and traces of nitrosamines, other toxicants, carcinogens, heavy metals, and metal nanoparticles. Its exact composition varies, and depends on several things including user behavior. The health effects of vaping are not clear but vaping is likely less harmful than smoking tobacco. E-cigarette vapor contains fewer toxins, in lower amounts, than cigarette smoke. E-cigarette vapor also contains harmful chemicals not found in tobacco smoke. The World Health Organization's position is that it is hard to say if vaping is safer than smoking and it is best to not use nicotine at all. Nicotine is harmful and highly addictive. E-cigarettes can lead to tobacco smoking, and can be more addictive than tobacco. For people trying to quit smoking with medical help, e-cigarettes have a higher quit rate than normal nicotine replacement therapy. For others, e-cigarettes do not raise quit rates.
Electronic cigarette
Herbal cigarette
Ventilated cigarette
Roll-your-own cigarette
Cigarette
Herbal smokeless tobacco
Dissolvable tobacco
Smokeless tobacco