FOR RELEASE MONDAY, JANUARY 20, 2014, AT 12:01 A.M. EST - In this Jan. 3, 2014 photo, David Ehlers talks about how he and his wife, Paula, built an energy-efficient house on Cline Place in Lenoir, N.C. Ehlers refers to the home as an "earth berm" house, a term that refers to homes set in earth to make them more energy-efficient - the ground keeps the summer heat and winter cold well away from the walls. (AP Photo/The News-Topic, David Prewitt)
Featured Photo Galleries
