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Great Lakes watershed poster
Great Lakes Watersheds (Erb/Nature Conservancy)

No matter where you are located, you are in a watershed. A watershed can be as small as a few acres draining into a farm pond or as large as several thousand square miles for a major lake, such as one of our Great Lakes.

On this new map, created by the Nature Conservancy and produced by the Fred A. & Barbara M. Erb Family Foundation, the watersheds of our Great Lakes are depicted in vibrant color. Displaying both the individual and collective watersheds that make up the Great Lakes basins, this map helps to remind us that all of the water – clean and polluted – that flows into one of these watersheds will eventually end up in one of our Great Lakes. The map's simplified style and eye-catching color makes it a great addition to any classroom or home. 24" x 40"