The growing popularity of e-cigarette has prompted debate about their safety and potential to help people quit tobacco smoking and the risk they may encourage some people to take it up.

吸食电子烟越来越流行，引发了关于其安全性以及帮助人们戒烟的能力的辩论，还有人担忧吸食电子烟会导致一些人再度吸烟。

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Ray Story, chief executive of the Tobacco Vapor Electronic Cigarette Association, warned that tax rises on e-cigarettes would only benefit tobacco companies, to the detriment of public health.

CNN: Sales of e-cigarettes continue to soar

Altria, the US maker of Marlboro, has stayed on the sidelines thus far, but analysts expect the tobacco giant to either acquire an e-cigarette manufacturer or launch its own brand soon.

CNN: Sales of e-cigarettes continue to soar