An electronic cigarette (or e-cigarette, e-cig), also known as a vape, is a cigarette substitute. It gives small amounts of the chemical nicotine without the tobacco or other chemicals from real cigarettes.
The main substances making up in the liquid in the e-cigarettes are nicotine, propylene glycol, glycerin and some flavors or smells. Using an e-cigarette is known as "vaping".
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