The Double Tunnel Greenhouse is a style of Tunnel Greenhouse, using two Tunnel Frames?, that is an Inner Frame? and Outer Frame?, which support the Inner Cover and the Outer Cover? - between which is created the bubble Cavity Space.

The image above shows the Outer Frame? (with the Outer Cover? removed) and the Inner Cover is shown covering the Inner Frame?. The lower section of Cavity Space forms a Soap Liquid Reservoir? that is flooded with the dilute soap and water Soap Solution.

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