The numbers came as a surprise and seemed to put policy makers into uncharted territory.The Food and Drug Administration took its first tentative step toward regulating e-cigarettes last year, but the process is slow, and many experts worry that habits are forming far faster than rules are being written.Because e-cigarettes are so new, scientists are still gathering evidence on their long-term health effects, leaving regulators scrambling to gather data.In interviews, teenagers said that e-cigarettes had become almost as common at school as laptops, a change from several years ago, when few had seen them.“It’s the healthy alternative taking over my school,” said Tom, a 15-year-old sophomore at a school in Westchester County, N.Y., who started vaping — the term for puffing on an e-cigarette — to kick a smoking habit.He said about 70 percent of his friends now vaped.But opinions were mixed on why the devices had caught on.A significant share said they were using the devices to quit smoking cigarettes or marijuana, while others said they had never smoked but liked being part of the trend and enjoyed the taste.

Two favorite flavors of teenagers interviewed were Sweet Tart and Unicorn Puke, which one student described as “every flavor Skittle compressed into one.” James, 17, the senior in Virginia, said he and his friends started using e-cigarettes when he was 13, after his father abandoned the devices in a failed effort to quit smoking.“It was something for us to do that was edgy and exciting,” said James, who asked that his last name not be used because he did not want his smoking habits to be on public display.He liked the smoke tricks that his friends had become good at, like blowing out the vapor so that it spun like a tornado.His favorite flavor is called Hawk Sauce, which he described as “a berry menthol kind of thing.”He has never smoked cigarettes and said he could not imagine ever starting.“There’s a harshness to cigarettes,” he said.“Girls think they’re gross.”E-cigarette use had grown exponentially in previous years, but from such a low base that the numbers had been relatively small.

But last year’s rise, which was captured in the Centers for Disease Control and Prevention’s annual youth tobacco survey of about 20,000 schoolchildren, lifted e-cigarette use above that of traditional cigarettes, prompting an outcry from anti-tobacco advocates.They warned that e-cigarettes were undoing years of progress among the country’s most vulnerable citizens by making the act of puffing on a tobacco product normal again, and by introducing nicotine, an addictive substance, to a broad population of teenagers.“This is a really bad thing,” said Dr. Thomas R. Frieden, the director of the C.D.C., who noted that research had found that nicotine harms the developing brain.“This is another generation being hooked by the tobacco industry.It makes me angry.” High-School Tobacco Use Among high school students, e-cigarette use is growing rapidly, while the use of more traditional forms of tobacco, like cigarettes and cigars, is declining.Estimated share of high school students who used tobacco in the preceding 30 days, by product But the numbers had a bright side.

The decline in cigarette use among teenagers accelerated substantially from 2013 to 2014, dropping by 25 percent, the fastest pace in years.The pattern seemed to go against the dire predictions of anti-tobacco advocates that e-cigarettes would become a gateway to cigarettes among youths, and suggested they might actually be helping, not hurting.e cigarette second hand vaporThe pattern resembled those in Sweden and Norway, where a rise in the use of snus, a smokeless tobacco product, was followed by a sharp decline in cigarette use.“They’re not a gateway in, and they might be accelerating the gateway out,” said David B. Abrams, executive director of the Schroeder Institute for Tobacco Research and Policy Studies, an anti-tobacco group.Some teenagers described vaping as an entirely different culture from cigarette smoking, and scoffed at the idea that it could be a way into cigarettes.e cigarette protank

Kenny, the senior from Florida, said students liked the mix-and-match accessories that a user could “personalize and call your own.”“E-cigarettes appeal less towards the stereotypical longhaired stoners, and more towards sweatshirt-blue-jeans Silicon Valley programmer,” said Kenny, who asked that his last name not be published to keep his vaping habits private.e cigarette segamat“You can compare them to Apple computers.” The New Smoke Series Articles in this series examined the multibillion-dollar market for e-cigarettes and the consequences for public health.e cigarette store in kolkataFEB 23, 2014 MAR 5, 2014 MAY 3, 2014 JULY 15, 2014 SEPT.e cigarette sold in stores

29, 2014 China’s E-Cigarette Boom Lacks Oversight for Safety DEC.14, 2014 Selling e-cigarettes to minors is banned in many states, and the rule the F.D.A.proposed last year would ban it nationally.But the proliferation of vape shops and equipment for sale online has made access easy, and some teenagers said they simply clicked a button to indicate they were over 18 to be able to order a starter kit.e cigarette tobacconist(E-cigarette equipment includes batteries that can be shaped like cigarettes or a cellphone; liquid reservoirs, known as tanks; cartridges; and battery chargers.)Ethan deLehman, 17, a junior at a private school in Pennsylvania, said he used to ask seniors who were 18 to buy him e-cigarettes at convenience stores, but now he has equipment and buys his liquids on the Internet.“You can just go online and click yes,” he said.He has used e-cigarettes to quit smoking, a habit he picked up to relieve the pressure over getting into college.