In the 20s, hemp is not illegalized, and it starts to become more used by the paper industry.
Hemp Paper
... or, you want something less direct:
These Pages May Get You High
The stories of a time traveler making his way across Earth's multiverse.* A POW from a future where prisoners are sent back in time,** he tries to navigate his way through infinite possibilities to find a way home.
(This is an actual TV series idea I have -- would be interested in a name for my lead as well, if anyone's got a cool idea.)
*He does it simply through time travel -- every time you go back in time and forward again, you're effectively entering another timeline -- there's rules for this, no "grandfather paradox" or "causality loop" nonsense
**because their sent back in time, they end up creating a whole new TL, and thus are effectively removed from history