community economic development. The growing used material retail outlets are another important piece of the puzzle, and we should expect to see conventional building supply retailers getting more and more involved with both deconstruction and used materials retailing. New information technologies and the internet are making possible the growth of used materials exchanges. Because of the expense and inconvenience of storing and advertising used building materials, many tons of useful materials are currently disposed of in landfills or illegally dumped. The new exchanges make possible connections between sellers and potential consumers of used materials that would have been impractical in the past. The state of Washington has a sophisticated electronic exchange2good2toss.cominvolving 14 counties and municipalities. RecycleNet Corporation, based in Guelph Ontario, has set up a free used materials exchange, along with an exchange for construction and related equipment at <build.recycle.net>. Habitat for Humanitywell known for its efforts to provide affordable housing to low-income peoplealso maintains a network of Re-Stores in many cities around North America. Most of the emerging green building material directories (discussed in Chapter II) have special sections on reused or salvaged materials, and some, like Austins Sustainable Sources, have internet exchanges. Many of the new initiatives, like that of the Maine Housing and Building Materials Exchange (2004), have an explicit concern with providing low-cost materials for low-income people, and with providing jobs through a growing infrastructure of recycling and reuse. Philadelphia's Building Materials Exchange (BME) is a nonprofit clearinghouse for surplus and salvage building materials that also helps needy