Charles Kelly, president of Canada's B.C. Ready-Mixed Concrete Association writes about the importance of choosing building materials based on sustainable features. He contends that suppliers will need to be more transparent to help industry professionals make the best choices. He also notes that the U.S. National Ready Mixed Concrete Association has taken a key step to help its members gain a half point for LEED certification by launching an environmental product declaration campaign. "It isn't about selecting one material over another, but how the materials work together for a more sustainable built environment," he argues.