(CNN) One in four teens who vape say they've used e-cigarettes for an alternative technique known as "dripping," new research finds. E-cigarettes heat liquid and turn it into vapor, which a user inhales and then exhales in a large puffy cloud. Shihadeh, a project leader at the Center for the Study of Tobacco Products of Virginia Commonwealth University, was not involved in the new study. Ray Story, CEO of the Tobacco Vapor Electronic Cigarette Association, an industry group, suspects the number of teens who have tried dripping may not be as high as the study indicates. In an unrelated study last year, Shihadeh and his colleagues approximated realistic dripping scenarios under laboratory conditions and then measured temperatures and emissions.

Source: CNN February 06, 2017 09:00 UTC