Brent Zettl, president and CEO of Prairie Plant Systems Inc. and SubTerra LLC, looks at some of their plants on April 4 in a former copper mine used for plant-based pharmaceutical research in White Pine, Mich. Prairie Plant Systems Inc., a Canadian biotechnology company that’s been growing plants underground for more than a decade, has a contract to supply medical marijuana in Canada and would need approval from Michigan and federal officials to convert the mine in White Pine to marijuana production. (Romain Blanquart / Detroit Free Press)
Read the article: Company wants to grow medical marijuana in old U.P. mine
Read the article: Underground pot farm could breathe new life into mining town
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