LONDON (Reuters) – Oil prices firmed on Monday amid tensions over Iran’s nuclear program but gains were tempered by concerns about global economic growth and consequently oil demand. FILE PHOTO: Pumpjacks are seen against the setting sun at the Daqing oil field in Heilongjiang province, China December 7, 2018. REUTERS/Stringer Brent crude futures were up 66 cents by 1353 GMT at $64.89 a barrel. […]

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