There a lot of changes to this weekend’s Living Green Expo at the state fairgrounds.  First, the location inside the fairgrounds is different, to make room for the Friends Plant Sale in the Grandstand. The Expo will be in a series of buildings along Cosgrove Street, and the main entrance on Snelling will be closed. The hours have also changed. New attractions include a “Complete Street in Action” exhibit, some plug-in cars, and even a “green wedding.”