|Lake Michigan, March, 2014|
From that paper:
The main cause for such algal blooms is an overload of phosphorus, which washes into lakes from commercial fertiliser used by farming operations as well as urban water-treatment centres. Hotter and longer summers (emphasis mine) also promote the spread of the blue-green scum.Oh, in regards to this summer, northern Ohio, like the rest of Midwest, is experiencing a very cool summer.
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