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MIT researchers produce copper without harmful byproducts

Andrew Topf | July 02, 2017 | 6:10 pm Base Metals Copper 

Removing the copper (and other metals like zinc, lead and molybdenum) typically found in sulphide ores involves a process of burning the minerals to remove the sulphur, which produces sulphur dioxide- a dangerous chemical that is converted to sulphuric acid....

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