This environmental atlas of the Great Lakes includes articles, maps, diagrams, and tables concerning the region's natural and social history and current environmental processes and conditions. The atlas also provides overviews on the climatology, geology, hydrology, and ecology of the Great Lakes region, as well as information on settlement patterns, agriculture, forest resource use, fishing, infrastructure, pollution types and sources, and environmental management institutions and processes. Links are provided to other US EPA programs on the Great Lakes.