Lessons for Northern Minnesota From 5000 years of Copper/Sulfide/Acid Mining in Spain, Followed by a Single Generation of Failed...
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Dr Kohls is a retired physician who practiced holistic, non-drug, mental health care for the last decade of his family practice career. He now writes a weekly column for the Reader Weekly, an alternative newsweekly published in Duluth, Minnesota, USA. Many of Dr Kohls’ columns are archived at http://duluthreader.com/articles/categories/200_Duty_to_Warn
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