Green as a representation of evil

[Joy]

Has anyone noticed the theme in Lit where the color green represents evil?


In LotR, it is used a couple of times (Minas Morgul, Paths of the Dead, and in the Dead Marshes.)

In classic Lit we see this in Sir Gawain and the Green Knight as a repeated theme.

Here is something else (though a later date). Green was the favourite color of Napoleon and the green wallpaper in his exile home in St. Helena became his undoing. His premature death was not the work of a poisoner but was caused by the noxious fumes emanating from the bright green wallpaper.

Discovery of the pigment emerald (Schweinfurt green) in 1800 further worsened the repute of green as the color of poison. Emerald was prepared from verdigris and copper arsenite to result in one of the deadliest poisons ever used in painting.

***********
So this color paint did emit very toxic fumes.

Often in comic book and cartoons, we see "stink" by green fumes.

Why is this and when did this begin??

***********
Lastly, what other instances do we see in Tolkien's work of this??