gold mining
...that in gold mining, cyanide may be used to extract gold in areas where gold-bearing rocks are found at the surface?
...that in <b id="mwASw"><a href="./Gold_mining" id="mwAS0" rel="mw:WikiLink" title="Gold mining">gold mining</a></b>, <a href="./Cyanide" id="mwAS4" rel="mw:WikiLink" title="Cyanide">cyanide</a> may be used to extract <a href="./Gold" id="mwAS8" rel="mw:WikiLink" title="Gold">gold</a> in areas where gold-bearing rocks are found at the surface?