Since the time of the Transcendentalists, Bostonians have worked hard to promote gardens, parks, green spaces, and ecological conservation. Now, Boston's diverse open spaces share a rich legacy and exciting future. Once again ingenious Bostonians are working hard to make their city and its environs green. Invoking the ecological spirituality of Emerson and Thoreau, these neo-Transcendentalists are growing cutting-edge rooftop greenery, building harbor-side...