E-cigarette popularity has increased and with that another possible source of toxicity.

电子香烟开始变得流行，于是产生了另一种可能的毒性来源。

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In fact, combined e-cigarette and cigarette use among adolescents in 2014 was higher than total cigarette use in 2009, according to the study.

事实上，据研究发现，2014年同时在抽烟和抽电子烟的青少年数量要比2009年显示的吸烟数据更高。

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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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Male smokers clocked in at 56% of e-cigarette users versus 44% for women smokers.

FORBES: E-Cigarettes Spark Interest Among Millennials

In my opinion, without a major success in the e-cigarette initiative, Altria faces fewer and fewer growth prospects.

FORBES: Altria Group: E-Cigarettes Or Die?

With an e-cigarette your nicotine is delivered with propylene glycol and vegetable glycerin rather than tar and ash.

FORBES: Will E-cigarettes Become A Taxing Experience ?