Innovators need feedback to make their great ideas even better. So, we try to connect experts with our PF innovators every chance we get. In our WEBISODE this week, a top architect gives feedback to 3 ideas — green urban rooftops, hemp-based building materials and large-scale passive solar. Bill Worthen, the National Director and Resource Architect for Sustainability at the American Institute of Architects, sat down with Frank Sesno to talk about the pro’s and con’s of each idea.