How much oil is really in ANWR?

The Porcupine Caribou herd in the Arctic National Wildlife Refuge’s coastal plain. (Photo courtesy U.S. Fish and Wildlife Service)The coastal plain of the Arctic National Wildlife Refuge ranks as one of the most controversial chunks of land in Alaska. Since Congress set it aside for more study in 1980, environmental groups, politicians and the oil and gas industry have battled over whether to explore for petroleum there or to protect the wilderness forever.
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