How to evaluate whether an architect knows about green residential home design

Some architects choose to specialize in a certain type of construction, as well. With the advent of more readily-available sustainable building supplies, the number of architects with knowledge and experience in designing environmentally-friendly homes is increasing. Sustainable design can mean different things to different people, so it is crucial to investigate an architect's philosophy before making a commitment. Does the residential architect plan to spend time to optimize the building's location on the site in order to take advantage of natural light and use existing vegetation and other features for shade or blockage of wind? Do they normally work with materials from sources that are readily renewable? How about utilizing recycled materials? What is their commitment to promoting ongoing efficiency and savings through the use of alternative power sources and recycling water, whenever possible? Do they have a network of suppliers of building materials who are local, thereby minimizing transportation costs and the fuel required to transport supplies from long distances?