In recent years, the number of e cigarette users worldwide has sharply increased, with many believing that vaping is less harmful than smoking traditional cigarettes. However, health experts are warning of its negative Vaping: How popular are e cigarettes? Vape Vs E Cigarette E Cigarettes, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) E Cigarettes and Vape Devices NH Department of Environmental Services Johns Hopkins researchers find thousands of unknown chemicals in electronic cigarettes Hub