It’s estimated that nearly two-thirds of aquatic invasive species currently in the Great Lakes hitched a ride in the ballast water of cargo ships crossing the ocean. However, the same isn’t true of lakers, or ships that move exclusively within the Great Lakes. While the ballast water of these ships isn’t introducing new species, there’s a good chance it’s spreading invasive species throughout the lakes. Read the full story by Interlochen Public Radio.
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