Michael V said:

btm said:

On the subject of space ships in sf, why do so many characters in sf films smoke cigarettes on spaceships — an environment with critically limited oxygen? In a lot of films about submariners, the characters smoke, too, even though oxygen is also in extremely limited supply. The Hunt for Red October is a prime example.

In older films, tobacco companies fed money to the film producers so the actors would smoke, IIRC.

I was going to mention this, but the rain distracted me.