This Saturday and Sunday, May 2 and 3, the St. Paul State Fair Grounds is host to the Living Green Expo, billed as: ... a free, family-friendly event that inspires people to lead healthier and more sustainable lives. The focus of the event is living green, of course - not specifically food - so the many vendors and providers (250+) include those in industries as diverse as transportation, building, arts, and music. Here are the details: