This episode is set in Lexington, Mass., at the "Big Dig" house. Constructed from pieces of the country's largest public works project, the burying of Boston's Central Artery highway, this house is a prime example of reused materials. Licensed contractor and host Amy Matthews hits Redondo Beach, Calif., to see how a company called Prevailing Wind Power sells and installs plug-and-play residential wind turbines. In Austin, Texas, host Kevin O'Connor investigates the radical but rational idea of using a house's swimming pool as a heating and cooling source. Kevin also visits one of Habitat for Humanity's ReStores in Knoxville, Tenn., to learn about the variety of bargain building materials these outlets provide. At the International Builders' Show in Las Vegas, Nev., Amy takes a high-end golf simulator for a spin when tool expert and Cool Tools host Chris Grundy shows up and causes havoc. Kevin also explains how a highway off-ramp has become a house, and Amy explains why commercial-grade windows make a good choice for residential use.