Reane Loiselle, a water resource specialist with the Mary Griggs Burke Center for Freshwater Innovation at Northland College, filters water near Friendly Valley Beach as she collects samples from Lake Superior on Sept. 22, 2021, in Washburn, Wisconsin. Researchers are trying to figure out why the unlikely threat of harmful algae blooms has arrived in Lake Superior and how drastically climate change is altering one of the world’s largest freshwater lakes. (Erin Hooley / Chicago Tribune)
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