Sustainable building appears to be an emerging area of opportunity, with nearly half (45 percent) of respondents reporting its ability to give them a competitive business advantage. To meet demands, more than half (56 percent) of contractors report registering or certifying their U.S. projects with the U.S. Green Building Council (USBGC) or Leadership in Energy and Environmental Design (LEED) over the past three years. Four out of five contractors also cite that their customers request energy efficient materials for their U.S. projects, which shows demand for green materials is also strong.