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SIRIUS North Africa tour 1991.  Sampling seabed near zinc extraction  plant outflow, Ghazaout, Algeria.  The zinc is treated in sulphuric  acid which is eventually discharged into the sea.
SIRIUS North Africa tour 1991. Sampling seabed near zinc extraction plant outflow, Ghazaout, Algeria. The zinc is treated in sulphuric acid which is eventually discharged into the sea.
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