An Earthship is a type of passive solar house that is made of both natural and upcycled materials (such as earth-packed tires). Earthships can be completely off-grid or partially off-grid.
Earthships can be built in any part of the world, in any climate (with a permit) and still provide electricity, potable water, contained sewage treatment and sustainable food production.
Earthships are thermal mass homes first, passive solar homes second.
Whatever temperature goes into an Earthship, it will hold… and since it is also a Passive Solar House, it is also very tight and interacts only with the sun and the earth for heating and cooling, providing stable comfort year round in any climate.