These structures are built with fully recycled materials and make you almost totally independant from the city in that you don’t need heating, sewage or other facilities. The walls are made of filled tyres creating the brickwork. As each area where the earthship is placed is unique, so is the design and as the materials are recycled and cheap, you have a custom built design to suit your needs at a fraction of the price of a ‘normal’ house. Sounds like an ecologically sound and attractive idea. Am I turning into a tree hugger?