Royal Dutch Shell PLC, the biggest winner in an Alaska lease sale this month, may use a single rig in the Beaufort Sea this year because of opposition from environmental groups to develop Arctic offshore oil fields. Shell has scaled back an original plan to use two rigs to take "a measured approach" to offshore oil exploration, John Hofmeister, who heads the company's U.S. unit, said in an interview in Anchorage, Alaska, Tuesday. Shell plans to drill...
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