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scientist recognized lake Erie is undergoing human caused eutrophication.
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US and Canada pass the Great Lakes Water Quality Agreement to lower the amount of phosphorus entering the lake.
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Total phosphorus reduction since the passing of Great Lakes Water Quality Agreement marks 60%.
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Total algae blooms declined by 89%
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Algae blooms burst in 1989
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Blooms of toxic algae burst and the water becomes toxic to life.
