What happens naturally and man-made concrete things and abstract things that are visible with the naked eye and cannot be seen by the eye and wasing pla will not be useful.
What happens in nature and man-made things tangible and intangible things that seen with the naked eye and can not see with the eyes festivities something useful, and it's not helpful.
The wild things and what humans created what is the concrete and abstract things to see with the naked eye and cannot be seen with the eyes, not something useful and not useful.