Market failure - e-cigs....

Beyond questions over the dubious health consequences of vaporizing itself, many electronic cigarette users have learned that their new habit may present unforeseen dangers of a different kind. In report after report, media sources have described sudden, often inexplicable, e-cig explosions, incidents that have left users with severe burns, deep puncture wounds and blind. Wide-ranging fires are common, and some vapers have been left with searing chemical burns.
After investigating, fire marshals across the country have come to a unanimous conclusion: defective lithium-ion batteries are blowing up, and the risk seems highest when an electronic cigarette is charging.

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E-cigarettes - government failure?