| http://www.w3.org/ns/prov#value | - At the town of Cobalt in Canada it plans to remove toxic elements such as arsenic from old silver-mine tailings and extract cobalt, nickel and silver. ???First and foremost, we are trying to remediate the environment,??? explains Paul Miller, vice-president of engineering at BacTech. ???But by doing that, we also hope to recover valuable metals.???
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