The Gristmill reports that Dr. Seuss' The Lorax makes a top 10 environmental books list. This reminds me of a great economics paper on Dr. Seuss, written by an economist and an ecologist:
Paul Chambers and Ken Cramer, “Lessons in Ecological Economics from Dr. Seuss,” The Natural Environment: Interdisciplinary View, Proceedings of the Interdisciplinary Conference of the Environment, 1995.
I seem to recall that this won a best paper award at the conference. Alas, 1995 was the dawn of the internet and there appears to be no electronic copy of this paper out there. Unless, my graduate school office mate has one laying about?