Among the leading pioneers of the eco-art movement, the collaborative team of Helen (born 1929) and Newton Harrison (born 1932) have worked for almost forty years with biologists, ecologists, architects, urban planners, and other artists to initiate collaborative dialogues to uncover ideas and solutions which support biodiversity and community development. Their concept of art embraces a breathtaking range of disciplines. They are historians, diplomats, ecologists, investigators, emissaries, and art activists. Their work involves proposing solutions and not only public discussion but extensive mapping and documentation of these proposals in an art context. Their projects have often led to changes in governmental policy and expanded dialogue around previously unexplored issues leading to practical implementations throughout the United States and Europe.