Survey: 2M U.S. Teens Are Vaping Marijuana

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WASHINGTON (AP) – A school-based survey shows nearly 1 in 11 U.S. students have used marijuana in electronic cigarettes, heightening concern about the new popularity of vaping among teens.
E-cigarettes typically contain nicotine, but results published Monday in the journal JAMA Pediatrics mean a little more than 2 million middle and high school students have used the devices for pot.
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U.S. health regulators recently gave the five largest e-ciga