More and more women have began smoking in the last few decades. One of the reasons is savvy marketing as Don explains to Yael in this Moment of Science.  
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D: Yael, what's that in your hand? (来源：英语分类信息 http://fl.englishcn.com)

Y: Come on, Don. Haven't you seen a cigarette before? Every day in the United States, about 1500 girls begin smoking, and I figured, why not do my share?

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D: But Yael, don't you know that tobacco kills more than 140,000 women each year, and that half of those women are between the ages of thirty-five and sixty-nine? (来源：EnglishCN英语问答中心[e问e答])

Y: Yeah, but that's why I smoke a brand with low nicotine and tar content. (来源：EnglishCN英语问答中心[e问e答])

D: Although tobacco companies advertise some cigarettes as "light," this is just an advertising ploy to obscure the risks associated with smoking--smoking a light cigarette is just as risky as smoking a regular one. In fact, research shows that people who smoke light cigarettes actually smoke differently in order to get higher levels of nicotine.

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Y: I didn't know that. (来源：最老牌的英语学习网站 EnglishCN.com)

D: The one thing you can say about tobacco companies is that they are really savvy about marketing. While tobacco ads that target men focus on cigarettes as macho or cool, tobacco ads that target women focus on social and political themes important to women. For example, ads will say that you've come a long way, or that you've found your voice, or encourage you to just be yourself, as if smoking has anything to do with progress and self-expression. Young women are especially vulnerable to these ads because addiction, disease, and premature death seem so remote to them.  And the thing is, people who have smoked as few as one hundred cigarettes report having difficulty quitting.

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Y: So, Don, can you pass me that ashtray? (来源：英语麦当劳－英语快餐EnglishCN.com)

D: With pleasure, Yael, as long as you put it out. (来源：英语图片 http://photo.englishcn.com)