Animals were living in beautiful nature, but humans destroyed it, and animals lost their place for living. One creature which looks like a fox brought some seeds from the world of beautiful nature, and began to raise plants. Beautiful white balls were born from only a few plants and they were scattered to the polluted world. By these white balls, animals take back their beutiful nature for living.
I think the producer of this animation wants to tell us that we can get beautiful nature back by taking a small action. We have go into action as early as possible before it is too late.