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Crude oil 2012 6 25

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Biggest and smallest oil producing countries [INTERACTIVE]
GlobalPost infographics showing where the world's crude oil comes from.
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Crude oil 2012 6 25

View of the structures used to precess oil at Mexican state-owned petroleum company PEMEX refinery in Tula, Hidalgo state, Mexico on March 8, 2011. AFP PHOTO/OMAR TORRES (Photo credit should read OMAR TORRES/AFP/Getty Images)

OMAR TORRES
AFP/Getty Images