One possibility is plain abandonment. The gradual rust conciliates technology and nature. Something Julio Cortázar would have called the unfair cycle of trash. Example: this Mercedes 1114 school bus will hardly have a different chance.
The other possibility as an extra flair of poetry. The bus, already disabled for its original task, ends up taking up a new job and avoiding retirement…. In the picture, a 1960 English-made Leyland renamed “Choribus”. Now it hosts the kitchen room! Instead of children, grilled sausages come out of its depths now. Well, there is not a big difference if you read it as a Pink Floyd The Wall metaphor.