Which is a burden that tobacco use places on society?
There is a rising trend in e-cigarette, or "vaping,” use among young adults. According to the graph, what is the approximate percentage of high school students who had ever tried e-cigarettes, in 2012?

A sign in front of a store says "No Smoking.” What kind of factor is this sign?
How do nicotine and tobacco cause cancer?
Which is a type of media that would most likely influence a person to use tobacco?
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