Most animals are raised underground, most plants on the surface, under plastic roofs.
A greenhouse has a transparent glass or plastic roof and walls that let sunlight in.
A mass of red-hot metal pushes through the plastic roof and drops directly onto his face.
His scheme, top, would replace almost all the buildings with an exhibition plaza under a translucent plastic roof.
It usually has a glass or clear (transparent) plastic roof.
"You didn't do bad, considering," his wife said, finishing off the orange plastic roof.
Above her was a dark brown plastic roof.
Designed to sell at £227 the model was first launched with a large plastic roof vent which soon earned it the name of the bubble-top.
It has an opaque blue plastic roof and a zippered door.
Windows swept into the black plastic roof, a feature that remains in the production model.
