Morning light streamed through the clear greenhouse roof, illuminating a thousand tiny curves of yellow-green seedlings.

On the coldest day of the year, the greenhouse roof opened by accident because of some electrical problem.

I heard it on the greenhouse roof.

Rainwater that sheds off the greenhouse roofs is recycled to supplement the water used to irrigate the plants.

The impression, caught out of the corner of his eye, had been that of a greenhouse roof with the sun on it.

The Switching fluid in the greenhouse roof can be used as a filter for a certain part of the solar spectrum.

The greenhouse roof shivered under the shock, dropping panes of glass.

How about a third-floor open-air dining room with a greenhouse roof that can zip itself closed at the first raindrop?

He crashed through a greenhouse roof, as retold in the movie The Longest Day.

I saw him thinking and then it just came to him - solar panels on the greenhouse roof.