We all know that human development impacts nature, and that the most developed of human spaces — cities — without any nature in them, negatively impacts humans. Since the very beginnings of the fields of landscape architecture and public planning, there have been designers, builders, thinkers and dreamers who have worked to interweave nature — its sense of green, of refuge, or peace — into these otherwise very inorganic areas, for the benefit of both the ecological world and the benefit of humans. Think of Frederick Law Olmstead’s work in New York’s Central Park and many, many other urban parks across the country at the turn of the 19th century. To varying degrees of success, generations of landscape architects since Olmstead have carried the torch.