Global warming will open sea routes across the Arctic but also will thaw ice beneath inland access roads, turning regions back into isolated wilderness, according to a study. This would hurt access to timber, diamonds and other minerals in inland regions, says study co-author and geographer Laurence Smith. "It's a resource frontier where we don't even know what all is there and I'm beginning to think we never will," he said. "These places are going to become wilder and the lands are going to be abandoned and revert to a wild state."

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