Foto: Ropná horečka v Severní Dakotě

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An aerial view of an oil well site near Watford City, North Dakota is seen in this picture taken May 17, 2012. Many North Dakota oil region residents receive $50,000 or $60,000 a month in oil royalties and some more than $100,000, said David Unkenholz, a senior trust officer at First International Bank & Trust in Watford City. Picture taken May 17, 2012. REUTERS/Ben Garvin (UNITED STATES - Tags: ENERGY ENVIRONMENT SOCIETY BUSINESS) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. NO ARCHIVES. NO SALES Published: Říj. 3, 2012, 7:50 odp.
Stát Severní Dakota v USA je považován za americké "království" ropy. | Foto: Reuters