This lecture will address the processes and tools used to determine the "greenness" of products and materials typically used in the construction process. We will begin with a brief discussion of Embodied Energy as a central factor in Life Cycle Analysis (LCA), one of the primary methods for judging a material\'s sustainability. We will then present some simple tools and techniques that allow for the practical application of these concepts to the materials selection process. Primary criteria for judging the "best in class" in specific product categories will also be discussed, as well as sources of supply. This lecture is intended as a general introduction to the green materials selection process.