Earthship

An Earthship is a type of passive solar house that is made of both natural and upcycled materials (such as earth-packed tires), designed and marketed by Earthship Biotecture of Taos, New Mexico. The term is a registered trademark of Michael Reynolds, founder of Earthship Biotecture and the Earthship Academy.
A building cannot be considered an Earthship unless it addresses six principles or human needs: 1) Thermal/solar heating and cooling, 2) solar and wind electricity, 3) contained sewage treatment, 4) building with natural and recycled materials, 5) water harvesting, and 6) food production.