About two-thirds of the world’s population will live in cities by 2030, according to the United Nations. The U.N. says poverty is already growing faster in urban areas than in rural ones, and feeding the world’s hungry urbanites poses a mounting challenge. Experts say cities must grow more of their own food, wherever they can. In the struggling U.S. city of Baltimore, that means turning urban blight into a source of healthy greens. VOA’s Steve Baragona takes a look.