Sustainability in architecture isn't just about new construction. The preservation and reuse of existing buildings will play an increasingly imortant role, too.
A 2005 Brookings Institution report predicted that by 2030, half of the buildings in the U.S. will have been constructed after 2000. Think of it: The volume of construction in the first few decades of this century will match the entire remains of the previous two centuries. For green building advocates, this revelation highlights the urgent need to improve the quality of new construction. But what of the old?