Calculate the number of people who would have to stop driving altogether in order to offset the amount of oil production expected from the Arctic Wildlife Refuge Assumptions: Total petroleum reserved at ANWR = 3.2 x 10^9 barrels Time to pump= 50 years 182 million cars in the U.S. 12,000 miles/year driven current average gas mileage = 20 mpg 90% of oil converted to gasoline 42 gallons/barrel