Instead of replacing natural habitat with a built environment, this research and development facility combines a maximum amount of habitable green spaces with a sustainable building. Its two towers are connected through an atrium whose ‘rain-check’ wall, comprising glazing panels separated by perforated panels, allows passive cross-ventilation while keeping out the rain. A light shaft cut through the taller tower increases daylight penetration. A 1.5-kilometre-long landscaped ramp snakes around the building from the ground plane to the planted terraces and roof gardens, its overhangs and shade plants helping to cool the facade. Harvested rainwater is used for irrigation. Analysis of the local solar path determined the form of the extensive sun-shading louvres.