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。

youdao

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 ?