Various rays go out from the sun, and some of them when they strike an object cause light to scatter in its diverse colors and heat to be felt. So the whole vegetable world may be considered as a vast mill receiving its motorpower from the sun. But in November this special power regularly dissolves here in the Northern hemisphere, the days get rapidly shorter, and with the leaves falling down from the trees and plants retreating again to the deep undergrounds the color green simply disappears mostly in nature.
Green means for us a very particular color while we are living on a stone planet where plants emerged on the vast countrysides only 200 million years ago. So green was the first brilliant color sucessfully appearing on our planet Earth, before all was just looking more dark-greyish-brown like today in the very high mountains. Red appeared in fact much later in nature, so green sticks deep in our mind and genomic memories as a symbol of primordial life.
And plants took finally over all parts of the planet, even severe conditions not preventing their distribution like this alien looking cactus in the photo above. So for the first animals it was of great advantage to discover the plants more easily on the soil and subsequently learned to recognize the color green. At some remote period the red color became a part of nature, and a lot of animals also learned to observe this. But there are still some primates where just females can realize red and green, but the males only green.
So the green color represents an essential and original matter of our evolutionary being. Good to be not a cat in this regard which can only distinguish black and white because more is not required during an endless night.