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The Environmental Protection Agency has cleared another hurdle in Royal Dutch Shell's quest to explore for oil off Alaska's northwest coast. Interior Secretary Ken Salazar says he will not leave the Obama cabinet to run for governor of Colorado. Texas Governor Rich Perry and others are reacting to the EPA's move to rewrite smog standards set by former President George W. Bush. While environmental groups are cheering the proposal as long overdue, Republicans and industry leaders are criticizing it.

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