The author mentioned a series of fact that the government, both Republican and Democratic president, attached importance to the conservation of Arctic Refuge. The author mentioned the 8.9 million-acre Arctic National Wildlife Range and the Alaska National Interest Lands Conservation Act to farther support his argument. By mentioning specific facts, the author effectively strengthened his argument  that the government endeavored to preserve valuable natural resources. The facts turned an abstract statement into a more concrete one, and accentuating the argument that the Arctic Refuge deserved national attention and protection.