Mural reads: The Street of the Lifted Lorax; You Need a Thnead (x2); Thneads.
The Lorax is a real children book by Dr. Seuss that has been made into multiple movies (one of which is sometimes watched in APES). The colorful trees are Truffula trees (which are the raw material used to make thneads, a multipurpose cloth that everyone needs), the brown animals are Brown Bar-ba-loots, the birds are Swomee Swans, the fish are Humming Fish (they are amphibious), the little brown man on the yellow pedestal is the Lorax (he speaks for the trees), the machine that chops four trees at a time is the Super Axe Hacker, the green-armed driver of the Thnead truck is a Onceler, and the building at the right of the mural is the Onceler's thnead factory. At the left of the picture, the forest before development is shown. The animals live happily in their clean environment. Then, the Onceler comes to make a profit by chopping down the Truffula trees to make thneads, against the continued advice of the Lorax. Once all the trees have been cut down, there is no benefit to the animals or the Onceler, so he can make no more thneads. If, instead, he had only harvested some fluff from each tree, his profits could have continued indefinitely.