BBC: Oil firm Royal Dutch Shell has won approval from the US Department of Interior to explore for oil in the Arctic. The approval depends on Shell getting a nod from other US regulators, the Bureau of Ocean Energy Management said. Shell stopped Arctic exploration more than two years ago after problems including an oil rig fire and safety failures. Environmental campaigners oppose the move. Shell has spent about $6bn (3.85bn) on exploration in the Arctic - a region estimated to have about 20% of...