Concerns raised about slag pile dust

In 2014, Minerals Research Inc. began to reprocess the 100-year-old pile of copper mining slag by crushing it into an aggregate, trucking it out of the city and selling it. (VVN/Vyto Starinskas)

In 2014, Minerals Research Inc. began to reprocess the 100-year-old pile of copper mining slag by crushing it into an aggregate, trucking it out of the city and selling it. (VVN/Vyto Starinskas)

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