Meet the Invasive Pest Fueling Lake Erie's Toxic Algae Bloom

This September 23, 2011 photo shows a man holding a handful of Zebra mussels near Kingston, Canada, which have invaded Lake Ontario. Zebra mussels from the Caspian Sea, introduced to North America by accident, are becoming a veritable plague releasing toxic chemicals into the Great Lakes, Canadian biologists say. The mussels hitch-hiked to Canada on the ballasts of cargo ships arriving on the continent in 1986. And in the past two decades the thumbnail-sized creatures have spread and are found in more than a third of the Great Lakes. AFP PHOTO / Kilian FICHOU
National Journal
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