Completing the tree-filled trilogy, the AR turns to focus on timber, our fundamental link between trees and architecture. Timber, especially mass timber - is seen to be one of the most ecologically sustainable building materials and an obvious alternative in construction. But when a virtuous material is used to replicate capitalist models, the result can exacerbate, rather than counter the climate catastrophe. Scientist Suzanne Simard, architecture historian Erin Putalik and engineer Maria Smith share their projects, voices and perspectives on how we see, build and ultimately grow trees to operate in the same world that preserves and produces this essential building block of our existence. Hosted by Sabrina Syed. AR Ecologies, a podcast by The Architectural Review, explores the tension between architecture and ecology through critical positions. Instead of standalone interviews, each episode weaves curious and critical voices together to meet, discuss and give space to perspectives outside an architectural orbit. The first series revolves around trees, an audio counterpart to the AR October 2021 issue, available now.