The November purchase by Davis’s nonprofit of the long-neglected Woodlawn home of civil rights martyr Emmett Till and his mother, Mamie Till-Mobley, with the aim of rehabilitating it as a pilgrimage site, accomplished what the Till family had been struggling to do for years. (The city declared the house a landmark in January.) It also shed light on the need for the preservation of cultural landmarks in Black neighborhoods that have often fallen prey to predatory real estate developers. What’s more, it turned a spotlight on the prescient work Blacks in Green had already been doing — namely, promoting sustainable urban living, from walkable neighborhoods to green architecture, in neighborhoods too long ignored.