Russia's giant energy company Gazprom has the biggest reserves of natural gas in the world, and much of the country's new-found prosperity has depended on its exports to Europe. But now global gas prices are tumbling as new supplies come on stream, and the EU has launched a top level investigation of the company's grip on European energy. Peter Day examines Gazprom's future in an uncertain world.
Producer: Caroline Bayley
Editor: Jeremy Skeet
Published on Thursday, 17th January 2013.
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