The past and future of Smart Grid

Smart grid may be the most hyped words of 2009 in the green tech space, but that doesn't mean there isn't a lot of hard, cold cash behind the hype. Will 2010 bring a bursting of a smart grid bubble, or a continued unfolding of its promise to provide a framework for renewable energy, efficiency and conservation programs to come? Let these top stories of 2009 be your guide...