To celebrate Earth Day, Lithonia Mayor Tonya Peterson-Anderson, and others, will host a ribbon cutting at 12:30 p.m. Friday at City Hall, 6980 Main Street, Lithonia. The event is to kickoff the “Going the Green Mile” pledge and challenge, designed to empower through environmental education. The city has partnered with the Green Economy Diversity Initiative for this event, which will also recognizes the Georgia Municipal Association’s Cities Week, which ends Saturday.