Electronic cigarette smoking, or e-cigs, have been on the market in the U.S. since 2008 and have gained wider use in recent years. Now, data is starting to emerge on e-cigs’ short-term effects, and their negative and positive effect on people’s health. E-cigarettes are battery-powered devices that heat a liquid — usually comprising nicotine blended with the chemicals propylene glycol and glycerin, and often flavorings ranging from bubble gum to watermelon — into a vapor that users can inhale. Read full story.
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