But when I’m a passenger in a vehicle driven by a friend who smokes, they will inevitably light up without asking if it’s OK. They’ll crack their window and blow the smoke out through the crack.

‘It’s my best friend. I can’t imagine my life without it.’ So the idea of taking that away feels like a major loss to a person.” Understanding why it’s so hard for people to stop ...

But when I’m a passenger in a vehicle driven by a friend who smokes, they will inevitably light up without asking if it’s OK. They’ll crack their window and blow the smoke out through the crack.