All arid countries, despite not having the same landscape have the aridity as binding element.The project analyzes the issue of water scarcity, emphasizing not the problem, but developing a design solution that exploits the properties of algae to produce energy and substances for bio-products. Using the metaphor of the root, the algae grow in transparent tubes covering the surface of the pavilions. It is a production system in continuous cycle, which uses a minimum amount of water. A natural solution to the production of energy and food. The pavilions are arranged following the inclination given by the heliothermic axis, standardizing heat and light values to allow algae to grow in optimal conditions.