ナショナルジオグラフィックのインスタグラム(natgeo) - 9月18日 11時24分

Photo by @peteressick | The St. Louis River and Bay from Superior, Wisconsin looking towards Duluth, Minnesota and Lake Superior in the background. The St. Louis River is an Area of Concern under the Great Lakes Water Quality Agreement of 1987. The area is considered highly degraded because of high levels of contamination in the river sediment. Several restoration projects are ongoing in the watershed. In the foreground are two of the largest grain elevators in the world as well as a coal shipping facility.

[BIHAKUEN]UVシールド(UVShield)

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