| http://www.w3.org/ns/prov#value | - In more recent times, Russia has become an increasingly important producer, able to compete with the likes of Norway and Opec members such as Nigeria and Qatar.Recently, however, Nobuo Tanaka, the head of the International Energy Agency, said that global dependency on Opec for crude oil would in fact rise in the next five-to-10 years as output by non-Opec countries falls.All oil producers meanwhil
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