At the Frankfort Avenue Trolley Hop tonight, there’s an extra event.Clifton Universalist Unitarian Church is sponsoring the 6th Annual Louisville Sustainable Living Fair. Terry Malone is one of the event’s organizers, and says sustainable living is a core part of the church’s mission.“It doesn’t have to be difficult and it doesn’t have to be expensive,” he said. “There are a lot of little things that we all can do every day that collectively as a group, as a community, if we do those little things, they add up to a lot.”The fair will feature more than 50 vendors and exhibitors—some selling green products, but also from groups supporting conservation and sustainability.The Louisville Sustainable Living Fair is tonight from 5:00 to 9:00 at the Clifton Universalist Unitarian Church on Rastetter Avenue between Payne Street and Frankfort Avenue.