Copenhagen’s new Fælledby development will house 7,000 people, all in multistory wood buildings. In an effort to build a more sustainable future, architects and policy makers are nodding to the past with structures entirely made of timber. From a 70-story timber skyscraper in Tokyo to an all-wood, 200,000-plus square foot university residence hall in Arkansas, constructions that have eschewed steel and concrete for forest-grown materials have been sprouting up across the world.