Green can mean a lot of things, but when applied to building houses, it is usually associated with resource-efficient building materials, healthy-house construction, and energy-efficient building systems. Below is a listing of many of the references builders should consult if they are interested in such issues. For the sake of brevity, we have confined our list to information resources. Plugging into this information is the first step for anyone attempting to build environmentally sound houses. The next step is to find out where to get appropriate products and materials. Although distributor and manufacturer listings are not included here, they can be found in many of the directories listed below. Of the sources we reviewed, six in particular stood out: CRBT's Guide to Resource Efficient Building Elements
