In the book The Lorax what are some consequences of cutting down the truffula trees?

In "The Lorax," cutting down the truffula trees leads to severe environmental consequences, including the loss of habitat for the Bar-ba-loots and the decline of the Swomee-Swans due to air pollution. The Once-ler's actions result in the destruction of the ecosystem, causing the water to become polluted and the air to lose its freshness. Ultimately, the absence of the truffula trees leads to a barren landscape, showcasing the importance of sustainable practices and the impact of greed on nature.