What is Green?

My favourite colour is green,
Like the colour of the bean.
Green for the grass,
And for the bushes,
Green for the caterpillar that don't always rushes-
Green is the moss,
Which some people think is gross.
Green is the sound of a frog croaking,
Louder than anyone could be thinking-
And in the spring,
When leaves are turning green,
Green is the smell,
Of Mother Nature growing............