Greener Green Houses

This concept isn't a Green Dream as I didn't have a dream about these green houses.

I came up with this concept after working in a complex of green houses for two years.
The waste of energy, water and man hours leaves a lot of room for improvement.

In the drawing you can see underground tubes that can be filled with warm air from the green houses in the daytime and cool air from the night to save energy.

The four foot tall green houses would have an underground trench running underneath to provide worker access. A double airlock system would save energy.

Solar Panels and Mushroom Farming would make the green houses even more efficient.