Copper-gold explorer SolGold moved from Aim to the main market this month, in a bid to get on the radar of the world's largest banks and funds. But it's still several years from making any profit for its shareholders, among them chief executive Nick Mather.For the latest in our extraction podcast series, Mr Mather tells Alex Newman about exploring for metals in the Ecuadorian jungle, potential takeovers, and the outlook for copper and gold.

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