Cities all over the country are addressing the lack of access to fresh and healthy food on the part of their residents, but few are in as much of a bind as Baltimore. Like Detroit, and other cities known for their class and race disparity, Baltimore has been losing population and gaining vacant land at a fast pace in recent decades. The result is vast swaths of neighborhoods located far from grocery stores. Baltimore gave itself a D on its own 2010 Health Disparities Report Card, which found that 43 percent of the residents in the city's predominantly black neighborhoods …