Transcripción del resumen del autor. The last year has seen the main quoted oil companies become notably more 'gassy' in terms of their production mix. Gas production rose by a collective 6.5% to record output levels. In sharp contrast, after a brief revival in 2009, oil output declined again in 2010, taking the companies' collective output back to levels last seen in 2003 and 2007, reports Chris Skrebowski.

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