One of the greatest failures of the Bush era, if not necessarily of George W. Bush himself, was the lack of action taken on oil drilling in the Arctic National Wildlife Refuge. Bush favored the move and was prepared to sign legislation allowing it, but even when Republicans controlled both the House and Senate, they were not able to get majorities in favor to pass a bill and to stop a promised Democrat filibuster.
Why is the ANWR important? Because it is believed to contain more than 10 billion barrels of oil, and could add 1.5 million barrels a day to the supply of domestically sourced fuel under a full-production scenario.