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Published September 27, 2009, 12:00 AM

Green algae

This photo provided by John Kuglin shows some green algae on Thursday, Sept. 3, 2009, on Lake Pokegama near Chetek, Wis. Waterways across the upper Midwest are increasingly plagued with ugly, smelly and potentially deadly blue-green algae, bloomed by drought and fertilizer runoffs from farm fields, that's killed dozens of dogs and sickened many people. (AP Photo/John Kuglin)
Read the article: What’s ugly, smells, kills dogs? Blue-green algae plaguing Upper Midwest