As the bus rumbles through the 660-acre landfill, the children gasp and point at the hundreds of gulls and buzzards. A boy solemnly shakes his head. The bus rolls past a gigantic pile of tires, which are recycled rather than put into the landfill. But we don't bury them, because tires will not stay buried. The garbage is not packed so tight that it doesn't move around out there.
Tires are flexible and move toward the surface.
Eventually, they would break the seal we put over the landfill when it is closed. The bus driver stops so all the children can see. Big garbage trucks and scooping machines clang and roar everywhere. Overhead, the gulls screech constantly. Then it's time to go.