Many people who’ve spent much time around the Great Lakes take for granted that Lake Superior is the largest, coldest and clearest of the lakes.
While Lake Superior has not gotten any dirtier, lakes Huron and Michigan have gotten significantly clearer in the past 20 years or so, a study published earlier this year in the Journal of Great Lakes Research found. Click on the following sentence to access the full story.
They attribute part of that change to less phosphorous runoff. Climate change also likely plays a role. But the dominant factor is the explosion of invasive zebra and quagga mussels in the lakes since the late 1990s, researchers concluded.