We have traditionally addressed the range of environmental problems facing us through six project areas. Our projects function autonomously and work cooperatively with each other, and with others in the region who share similar concerns. Although focused on regional issues, the projects often work with local, national and international networks to achieve goals. The projects report to Global Sustainability's Board of Directors, which is comprised of one representative from each project's decision-making body as well as elected at-large members.

The Tennessee River Valley, the fifth largest river system in the country, is blessed with tremendous natural resources containing the richest biological resources of any freshwater system in the world. The ETHP, formerly known as the Clean Water Program, monitored the health and welfare of its wetlands, headwaters, and tributaries. Its sought to protect these waters through advocacy, education, and organizing. The protection of this region is a priority not only because of its biodiversity but also because it supplies drinking water to hundreds of thousands of citizens in Southern Appalachia who rely on safe and clean water for their families. Because states have authority over important aspects of watershed protection and restoration, ETHP took the lead in facilitating and nurturing a state-wide coalition called the Tennessee Clean Water Network.