Setting: the primitive place where the natural environment has been preserved
Conflict: urbanized world vs natural world
Irony: As the world is civilized and there are increasing inorganic substances, the living things come to be in poor health, and the scenery filled with beautiful green are replaced by the polluted area where everything has darkish, threatening gray colors.
Theme: It pays a high price for us to civilize our lives too much. When our lives become more convenient and urbanized, a lot of things are turned to be unorganized. But this video shows living things can't live without organic substances. So we can lose precious sources to live healthy when an eager desire for developed standard of lives blinds us.