All around the world, skyscrapers are increasingly featuring mass timber instead of steel or reinforced concrete. Architects praise timber structures, which use large, prefabricated wood pieces, for their resistance to fire and ability to sequester carbon.

Skylines in US cities like Chicago may soon include wooden skyscrapers, and the state of Oregon recently legalized mass timber high-rises. In Toronto, Canada, Sidewalk Labs — which is affiliated with Google's parent company, Alphabet — is planning to build a high-tech neighborhood out of mass timber.

Another neighborhood of wooden skyscrapers has been planned for Stockholm, Sweden, where local firm Anders Berensson Architects was commissioned to design a district with 31 towers made from cross-laminated timber.