There was once a grandfather. He had very little hair, and he lived in a forest.
On his death bed, he was fully bald. So he told his children, "You see my head? I have no hair. All of my hair has been wiped, and I hope this forest doesn't experience the same. Children, every time a tree is cut in this forest, plant a new one in its place."
So for years, and to this day, that forest still stands, each tree being replanted. All because of an old man and his re-seeding hairline.
