What’s so great about the Great Lakes? - Cheri Dobbs and Jennifer Gabrys

  2017-01-10 16:02:53
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View full lesson: http://ed.ted.com/lessons/what-s-so-great-about-the-great-lakes-cheri-dobbs-and-jennifer-gabrys The North American Great Lakes — Huron, Ontario, Michigan, Erie, ...

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