TIL about guayule (pronounced why-OO-lee). An alternative to rubber trees, it has a rubber content of 3% - 7%. It can be grown in hot, desert climates requiring a fraction of the water/fertilizer that rubber trees do. It's also weed, insect and disease resistant. It was used by the US in WW2.

https://en.wikipedia.org/wiki/Parthenium_argentatum
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1g9ik2r/til_about_guayule_pronounced_whyoolee_an/