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Sandbags are filled with sand and earth and stacked to form walls. Cal-Earth Institute has designed housing for locations ravaged by war or natural disasters. They have looked towards traditional earth brick buildings as inspiration for these structures.

Superadobe technology (sandbag tubes and barbed wire) was designed and developed by architect Nader Khalili and Cal-Earth Institute, and engineered by P.J. Vittore. Superadobe is a patented system (U.S. patent #5,934,027) freely put at the service of humanity and the environment. Licensing is required for commercial use.