designer's own words:R4Rally is a concept car based on the mythical Renault 4 outlines. This new design takes into consideration most of factors regarding sustanable development. One of the most efficient middle is to focus on energy cYcle on all stage of building and life of the car. The main body is made of streched fabrics on tubular structure in order to use considerably less energy than a body made of steel for example. Like furniture, we can observe that a car is used for moving but most of the time it stays immobile. It should be interesting to build on this fact by bringing a new fonction when the car parks: generate electricty with solar energy to reload it’s battery and when it’s charged to bring electricity for your house.