Royal Dutch Shell's controversial plans to drill for billions of barrels of oil in the Arctic's environmentally sensitive frozen waters face a potentially damaging legal challenge.
An alliance of conservation and Alaskan indigenous groups has filed a legal claim to prevent Shell drilling for oil this year in the Arctic Ocean's Chukchi Sea. Two years ago, Shell paid $2.1bn (£1.3bn) to the US government for 275 oil leases there.
The legal claim accuses the US's minerals management service, part of the federal interior department, of waving through permission to allow Shell to drill wells on the basis of an "abbreviated and internal review" of the environmental dangers of exploration.
The US portion of the Chukchi Sea, which separates north-western Alaska from north-eastern Siberia, is believed to hold 15bn barrels of recoverable oil and 76tn cubic feet of recoverable natural gas, according to the interior department.
http://www.guardian.co.uk/business/2010/jan/24/shell-challenged-on-alaska-drilling