As the world gets hotter and wildfires more intense, architects are turning back to trees for more than inspiration. Engineered materials like cross-laminated and glue-laminated timber, in which layers of wood are glued together, create beams that are tough and somewhat flexible, yet lightweight. They’re so strong, in fact, that designers are crafting wood structures that are 15, 20, even 25 stories high: In 2022, the 284-foot Ascent MKE Building opened in Milwaukee, Wisconsin, becoming the world’s tallest timber building. It’s exactly because the world is getting hotter that architects are pushing the limits of how tall they can build with “mass timber,” as it’s known in the field: As trees grow, they capture planet-warming carbon, which is then permanently incorporated into the edifice. To that end, last month crews completed a 10-story building in Vancouver, called the Hive, which is now North America’s tallest brace-framed, seismic-force-resisting (meaning it shrugs off earthquakes) timber structure.