Biggest and smallest oil producing countries [INTERACTIVE]
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)
Tell us about your experience accessing The World
We want to hear your feedback so we can keep improving our website, theworld.org. Please fill out this quick survey and let us know your thoughts (your answers will be anonymous). Thanks for your time!