Building tall buildings out of wood instead of steel offers a lot of benefits, most notably that it considerably cuts the carbon footprint of new construction. But the properties of wood mean that all-wood buildings have a height limit, after which wood isn’t a feasible construction material. A prototype from Toronto-based architecture firm Dialog gets around that by combining mass timber (solid wood panels nailed or glued together, the basis for tall wood buildings) with steel and concrete, plus solar-panel lined walls and an in-building algae bioreactor, for a 105-story skyscraper that would have no carbon footprint.
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