Every city deserves a secular conscience in the arts. Independent curator June Lambla assembles shows that address social issues from fresh, unexpected and eccentric perspectives. Her collaborative assemblies engage without preaching, and instruct without scolding. Two shows at the McColl Center — Contemporary Landscapes ... Crossing Boundaries and Stereotypes: Confronting Clichés — made environmental concerns and diversity training ... well ... riveting. She should teach Al Gore her secret handshake.