products produced with renewable energy, and/or made with recycled, reclaimed or salvaged materials. products made with organically-grown natural materials or agricultural waste (e.g strawbale walls) products with great durability products that can be easily recycled or reused at the end of their product life. products that avoid toxic emissions and contribute to better indoor or outdoor air quality (e.g. low-v.o.c. paints) products that constitute alternatives to especially commonplace and destructive materials like CCA-treated wood and polyvinyl chloride (e.g. ACQ-treated wood, bio-plastics and natural linoleum). products that reduce building energy or water use (e.g. super-windows) A checklist compiled by the Environmental Building News in developing its Green Spec directory is found in Table 2. A product might qualify for recommendation as green not necessarily because of how it rates in one of these criteria but because it ranks reasonably well in more than one category. Depending on the clientele of the directory, many other more specific criteria can be addedwhich might be social and economic as well as environmental. For example, a regional directory might place greater emphasis on products that make good use of a local resource, or that create local jobs throughout its product life. For some, the quality of the jobs might be especially important. The Sustainable Materials Database, for example, a project of the Center for Sustainable Buildings Research at University of