system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is radioactiveness always associated with the color green?

Everytime someone mentions radioactiveness, plutonium, radioactive waste or anything radiocative it is always associated with the color green or neon green, why is that?
gpt
It is mostly the green phosphor that was added to radioactive luminescent paint.

They made a paint that included a radioactive element and with a green phosphor. This was applied to things like clock faces. The radioactive stuff gives off radiation, which excites the phosphor so that it glows green.