Talking about the concept of "environment" means treating a multidisciplinary and interdisciplinary theme which revives a simultaneous consideration of multiple data social, economic, natural.... To date, the protection of the environment as a whole becomes a challenge for many countries, policies for the preservation, education and scientific research strategies are aimed at the environment and sustainable development. It remains an idea of its young problem, still current. It is development

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... at meets present needs without compromising the ability of future generations to meet their own needs. In the field of architecture and urban planning, environmental protection is an important place. With the growth experienced by this area, several environmental procedures have been invented to improve the quality of construction and use of buildings, a view mainly environmental but without neglecting the economic and social aspects. The environmental protection has long existed, it is found in the experiences of ancient cities such as Ksours. This legacy is an inspiration and an asset for the sustainable development of our cities today. According to Hassan Fathy "only in the tradition, we respect and we continue the work of previous generation that new generation can really move and solve the problem. ». The materials used the distribution of space, protection of natural resources such as water and palm trees, recycling, are the strategies of the company of Ksours to live in a healthy and comfortable space. The objectives of this paper are: .To highlight the history of environmental policy in architecture and urbanism in the world, in this case Ksours. . Renewable energy and strategies of the preservation of the environment in the Ksours .Sustainable development in Ksours: a notion that has long existed. . Establish strategies to protect the environment.