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The Big Nickel (L), a nine-meter high replica of a Canadian five cent coin, is framed with the Vale Inco Superstack (R), a 380-meter high chimney at the Copper Cliff Smelter Complex, in Sudbury, Ontario TORONTO — Mineral-rich Canada has potential to become a preferred supplier of cleaner nickel to power electric vehicles (EV), miners say, as automakers scour the globe for more environmentally friendly supplies of the metal.