The study that was published in the Journal of Adolescent Health says the young teenagers are being targeted in advertisements. Many of the ads are linked to sex and independence. They also claim the device will help you quit smoking. But Mr. Glantz says it is not likely they will quit smoking.

　　We have the kind of Wild West marketing that we did in the bad old days for cigarettes. And the kids are clearly responding to that. And youth use of e-cigarettes in Korea is going up very rapidly just as it did here in the United States.

　　American regulators report the number of young students using e-cigarettes increased two times from to . Now 1.7 million students use the devices.

　　Cigarette companies manufacture e-cigarettes. There are efforts in some U.S. cities to ban the devices. Many people believe that, until there are new rules, use of e-cigarettes will lead many people to become long-term smokers. Health experts say the best way to quit smoking is never to start.

　　This Science in the News was written by June Simms and Kim Varzi.

　　Im Anna Matteo.

　　And Im Christopher Cruise.

　　Join us again next week for more news about science on the Voice of America.

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