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A research project studying the effects that sulfates have on the growth of wild rice was conducted at the University of Minnesota Duluth. (2012 file / News Tribune)

MPCA releases preliminary findings from wild rice-sulfate study

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The Minnesota Pollution Control Agency Wednesday released its preliminary findings on how much sulfate pollution is too much for wild rice, saying a two-year, $1.5 million field and laboratory study shows sulfate above 4 to 16 parts per million ca

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