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Oil is below $50 a barrel, a price at which many exploration projects are far from viable. Lex's Oliver Ralph and Alan Livsey discuss the impact of a lengthy spell at this level and whether shelved or capped projects will cause a supply shortage, increasing prices again.
► Lex: http://bit.ly/1I14JZF
► FT Business: http://bit.ly/1KUK08s
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