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Is the multi-billion dollar e-cigarettes industry doing more harm than good? Jack Waxman is with the Students Against Nicotine campaign. He's worried about a new generation of vaping addicts in the US, after seeing many of his friends get addicted.

E-cigarette company Juul says that many of its customers have improved their health by quitting smoking, and denies that it markets its products at young people.

(Photo: Vape smoke cloud in front of a person's face. Credit: Getty images)