This report by Kalin Associates Inc. provides guidance to building specifiers on how to evaluate product claims about green attributes for incorporation into building designs. "By our definition, green products are those which maintain or improve the human environment while diminishing the impact of their use on the natural environment-in other words, sustainable." Characteristics of green products include green manufacturing, recycled contents, recyclable, low toxicity, and biodegradable. Who selects green products (owners, architects, engineers, and contractors) and when in the design/construction timeframe are they selected are discussed. A detailed checklist is included.