The story follows the Once-ler, a greedy creature who chops down all the Truffula Trees in the forest to make Thneeds, a popular clothing item. This destroys the habitat of the Lorax, a creature who speaks for the trees, and all the other animals in the forest.
Ultimately, the Once-ler realizes his mistake and vows to never chop down another tree. He also plants a Truffula seed, which symbolizes hope for the future.
The Lorax message is a valuable one for both children and adults alike. It teaches us that we all have a responsibility to take care of the planet and protect it from destruction.