An earthship is an off-the-grid and self-sufficient home that is made out of primarily natural and recycled materials like earth-rammed tires, cans, and bottles. Earthships harvest their own water from the sky and recycle that water multiple times. They grow their own food, treat their own sewage, and collect power from the sun and wind. They also use passive solar heating and cooling. Imagine no utility bills and a home that takes care of you year round.