Green building is a hot trend in residential construction. It considers the home's environmental impact from perspective of its design, construction, maintenance, and use. Factors include site-specific positioning, use of sustainable and renewable materials, energy-efficient building techniques, water conservation, indoor environmental air quality, and self-generation of energy. If you are looking to build green, look for elements such as open spaces, modest ceiling heights, and plenty of natural light sources. Also, be sure to consider 2x6 framing or other alternative building systems.