Earth shelter

Common card · No. 253014

An earth shelter, also called an earth house, earth home, earth-bermed house, earth-sheltered house, earth-covered house, or underground house, is a structure (usually a house) with earth (soil) against the walls and/or on the roof, or that is entirely buried underground. Earth acts as thermal mass, making it easier to maintain a steady indoor air temperature and therefore reduces energy costs for heating or cooling. Earth sheltering became relatively popular after the mid-1970s, especially among environmentalists. However, the practice has existed for nearly as long as humans have been constructing their own shelters.

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