In December, Google affiliate Sidewalk Labs unveiled its draft master plan for the Quayside neighbourhood in Toronto. Their proposal includes a dozen mass timber towers?some up to 30 storeys high?connected by underground freight and waste tunnels, and flexible podium (or ?stoa?) levels. Canadian Architect editor Elsa Lam spoke with Karim Khalifa, Director of Buildings Innovation at Sidewalk Labs, about the architectural details of the proposal. Here are highlights from their conversation: ...