I am the Lorax--I speak for the trees! I've noticed that the trees along the street in Wiesbaden (Germany) are numbered. I hear that they take their trees very seriously here.
Meanwhile, I do like Dr. Seuss. "Oh, the Places You Can Go" is a great one. One of my favorites is not a rhyming one. It's Bartholomew Cubbins and the Oobleck. If you haven't read it, you should. Goes to show what awful things can happen when we are dissatisfied with what we have already.