September 29, 2013 8:52 PM

No smoke, but lots of fire in debate over electronic cigarettes

A few years ago, virtually no one knew anything about e-cigarettes, battery-powered devices that don’t burn tobacco, but heat liquid nicotine into a water vapor. Today, more than 250 companies sell them. Multimillion-dollar marketing campaigns are just now hitting magazines and coming straight into your living room. But a backlash is heating up.

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