Yolanda Kakabadse Navarro Coordinator, Jeffrey McNeely, Coordinator, Don Melnick, Coordinator, Robin R. Sears and Guido Schmidt-Traub led the UN Millennium Project Task Force on Environmental Sustainability. The UN Millennium Project and its Task Forces comprise more than 250 scientists, development practitioners, parliamentarians, policymakers, and representatives from civil society, UN agencies, the World Bank, the IMF, and the private sector.