Architect Jim Logan reflects on our energy future in front of a solar-powered home he designed in Colorado.
Photo by Michael Shopenn
This American "dream" home is insulated and sealed with urethane foam in the roof, walls and basement.
Habitat for Humanity House features a long axis that faces south, with enough windows to gain some passive solar heat.
Wild Sage Cohousing Apartment Complex faces north and south, which allows significant heat gain through southern windows in the winter.