The question of whether or not to allow drilling for oil in the Arctic National Wildlife Refuge (ANWR) has been a political football for every sitting American president since Jimmy Carter. The Arctic National Wildlife Refuge is just east of Prudhoe Bay in Alaska's "North Slope," which is North America's largest oil field. Currently, the Prudhoe bay area accounts for 17% of U.S. domestic oil production. Over the years, studies performed by the US Geological Survey have shown that large deposits of crude oil reside within the land designated as the "1002 area" of ANWR, as well. Oil interest in the region goes back to the late 1960s. Since the 1979 energy crisis, the question of whether or not to drill for oil has become a hot-button issue for various groups. Traditionally, Alaskan residents, trade unions, and business interests have supported drilling in the refuge, while environmental groups and many within the Democratic Party have traditionally opposed it. Among native Alaskan tribes, support is mixed. In the 1990s and 2000s, votes about the status of the refuge occurred repeatedly in the U.S. House of Representatives and Senate, but as of 2007 efforts to allow drilling have always been ultimately thwarted by filibusters, amendments, or vetoes. A 1998 United States Geological Survey (USGS) study indicated at least 5.7 billion (95% probability) and possibly as much as 16.0 billion (5% probability) barrels (0.9 to 2.5 km%uFFFD) of technically recoverable oil exists in the Arctic National Wildlife Refuge 1002 area. The U.S. consumes about 20 million barrels daily. If the Arctic National Wildlife Refuge oil reserves were used to supply 5% of the U.S. daily consumption -- most is imported from Canada (19%) Mexico (15%), Saudi Arabia (11.5%), Nigeria (10.5%) and Venezuela (10.5%) -- the reserves, using the low figure of 4.3 billion barrels, would last approximately 4300 days, or almost 12 years. Using the high estimate, the reserves would last approximately 11800 days, or 32 years.
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