![Soft gray concrete, a polycarbonate screen, and metal roof bedeck the simple front facade of House A. Not immediately apparent? An underground water collection tank and solar panels. "We used a really high recycled content mix for our tilt-up concrete walls, which have 65-percent slag [a byproduct of steel production] instead of high-carbon emitting Portland cement," say the architects. Photo 1 of 10 in A Carbon-Neutral Concrete House Is an Exemplary Infill in Western Australia](https://images2.dwell.com/photos/6272473203005894656/6441435864941871104/original.jpg?auto=format&q=35&w=160)
A Carbon-Neutral Concrete House Is an Exemplary Infill in Western Australia
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Soft gray concrete, a polycarbonate screen, and metal roof bedeck the simple front facade of House A. Not immediately apparent? An underground water collection tank and solar panels. "We used a really high recycled content mix for our tilt-up concrete walls, which have 65-percent slag [a byproduct of steel production] instead of high-carbon emitting Portland cement," say the architects.