Answer:
Threats to the Great Lakes' ecosystems, include invasive species, climate change, pollution, and habitat destruction. Climate change affects water temperatures, weather patterns, and lake levels. Pollutants from residential, agricultural, and industrial areas reduce water quality.
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Answer:
Other human activities that have had an impact on the Great Lakes include intentional water level regulation, man-made alterations such as dredging, diversions, and water withdrawals, which have resulted in earlier thawing of the lakes, lower water levels, and, of course, the spread of industrial waste.
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