Great Lakes shrinking: what’s the business cost?

Guardian: Sea levels may be rising, but North America's Great Lakes are suffering from just the opposite problem: their water levels have been falling for the last decade and a half. Borne of glacial melt – but now at the mercy of the skies for most of their nourishment – the Great Lakes have been hit hard by shorter winters and warmer summers. Water temperatures and evaporation rates have increased, while water levels have remained below average for more than 14 years. "We have not seen anything like this......

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