The One Art Earthship is a four bedroom building which is currently being built. Earthships are radically sustainable green buildings made with natural and recycled materials. They are the most versatile and economical sustainable green building design in the world. They get electricity from the sun and wind, water from rain and snow, sewage can be treated on site, heating and cooling from the sun and earth, and food is grown inside and outside. They are comfortable in any climate. Earthship Biotecture is a building method based on over 40 years of research and development. Earthships can be residential, commercial and industrial buildings. Earthship Biotecture can be applied to retrofit conventional buildings.