As Shell Alaska's effort to begin exploratory offshore drilling in the Arctic Ocean runs up against a weather-related deadline in the Chukchi Sea, the company has asked to extend its drilling window there.
One of the last significant hurdles to offshore oil drilling in the Arctic was cleared Friday with approval of a plan to deal with a nightmare scenario - an oil spill at the top of the world.
Molten nuclear fuel at Japan's Fukushima plant might have eaten two thirds of the way through a concrete containment base, its operator said, citing a new simulation of the extent of the March disaster.
Oil gushed unchecked Wednesday from the leaking well in the Gulf of Mexico after BP's containment system was removed for repairs following a submarine crash, US officials said.
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