uilt of materials such as old tires and aluminum cans. It is the idea of a man named Michael Reynolds. Many Earthships are more or less self-sufficient because they provide their own heat, air and water. They often have gardens watered and fed by wastewater. They fortable and ecologically friendly. РThe main material used in building Earthships is tires. Tires are plentiful and can't be recycled like paper, plastic, and metal. While building supplies for most houses can be very expensive, old used tires are free. First, the tires are packed tightly with dirt. Each full tire weighs as much as 400 pounds. The tires are then stacked like bricks. The walls are extremely strong. They also help keep an even temperature in the house (between 60 and 70 degrees) without heating and cooling systems.
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