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Though Smith eschewed concrete for the walls, it's used for flooring and consists of 30 percent fly ash (a byproduct of coal-fired power plants).

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Originally appeared in Packed Naturally
on April 19, 2011
Though Smith eschewed concrete for the walls, it's used for flooring and consists of 30 percent fly ash (a byproduct of coal-fired power plants).
Though Smith eschewed concrete for the walls, it's used for flooring and consists of 30 percent fly ash (a byproduct of coal-fired power plants).

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