New York Times: Like many residents of this picturesque island town on the edge of Acadia National Park, Zach Soares had trouble keeping his house warm, going through five cords of wood in the winter. So he jumped at an offer last year for free energy improvements through a class project at the College of the Atlantic, where he works. As a result, Mr. Soares ended up burning about a cord less of wood typically about a $200 savings this winter and was so satisfied with the results that he now plans to insulate...