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great lakes water problem
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great lakes water problem, great lakes water level problems, water pollution problems in the great lakes, great lakes losing water, the great lakes water pollution, issues in the great lakes, great lakes environmental issues, great lakes pollution problems, great lakes water safety, great lakes water quality, great lakes drinking water, taking water from the great lakes, water level changes in the great lakes, why are the great lakes so dangerous, pollution of great lakes, pollution threat in the great lakes