SustainLane Chief Strategy Officer Warren Karlenzig joins Betsy to talk about how SustainLane has ranked the 50 greenest cities in the nation in their attractive and handy new book How Green is Your City?  The top three cities are on the West Coast, but cities from Boston to Honolulu have  green habits and new efforts, from Farmer’s Markets to Tap Water to Public Transportation, that they should be proud of and build upon: "Cities can learn from one other. They’re using these rankings to compare their metrics, how they’re performing in different areas on everything from green building to sustainability management."  LISTEN (7 min)