We have discussed how greening the built environmental can provide many opportunities for triple bottom line and sustainability gains at no additional cost. Nonetheless, the construction industry is widely recognized as trailing behind most other sectors in green initiatives and outcomes.1 Over the years, studies by government, academic, community and industry groups have identied technical and institutional barriers to the uptake of eco-logical design principles and practices in both renovations and new buildings [Box 7]. A host of new institutional arrangements and incentives have been put forward to address some of these impediments, such as performance contracting, green procurement, partnering, building rating tools, reduced mortgages for green buildings, and so on. However, greening the built environment will require more than attention to production and consumption drivers in the building supply chain. And a new architecture will require new design methods.