CHARLESTON, S.C.--(BUSINESS WIRE)--With dramatic changes taking place in energy markets, retail energy suppliers must drive new technology and innovation to develop new lines of business that can better meet evolving customer needs, Constellation said today. In a keynote address at the 26th Retail Energy Executive Forum, Constellation CEO Joseph Nigro said that companies need to identify new technologies and opportunities that are about to emerge and capitalize on them, rather than reacting to