Want to escape your utility bills? Consider an Earthship. These self-sustaining homes aren’t hooked up to the power grid or the water systems, but instead function entirely on their own to produce electricity, water, and even food. They harvest energy from the sun or wind, and keep their interiors cool via natural convection. The Earthship’s walls, which are typically made from tires or other dense materials, help to keep the temperature comfortable at all times.
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