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"We always say that renovation is the greenest form of construction; now we learn from Tilde Herrera of GreenerBuildings that it is a good investment, too. She writes about Seattles 80 year old Joseph Vance Building (covered in Treehugger earlier) and its"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/sustainable-product-design/the-untapped-green-within-graying-buildings.html>