Amit Katwala and Charlotte Williams explore the world of e-cigarettes and vapes, tracing their extraordinary growth and asking whether they’re life savers or something more insidious.

We hear from Time journalist Jamie DuCharme, author of the book Big Vape, about the rise and fall of the e-cigarette firm Juul who recently paid out over $430 million after being accused of targeting teenagers with its advertising. Shaun Yendalls, the owner of two vape shops in South London, explains why his staff actively try to stop people buying his products and Scott Butler from Material Focus details the massive environmental impact of the new fad for disposable vapes.

Presented by Charlotte Williams and Amit Katwala