"The Lorax" is a children's book written by Dr. Seuss that tells the story of a creature called the Lorax, who speaks for the trees and the environment. The narrative follows a young boy who learns about the consequences of industrialization and environmental destruction through the tale of the Once-ler, a character who cuts down trees to produce Thneeds, a popular product. The book emphasizes the importance of conservation and taking care of nature. It serves as a cautionary tale about the impact of greed and the need for sustainable practices to protect the planet for future generations.