Out of the top ten companies on the Fortune Global 500, Wal-Mart (#1) is the only one that's not a car or oil company. That seems reasonable, since there aren'

Out of the top ten companies on the Fortune Global 500, Wal-Mart (#1) is the only one that's not a car or oil company. That seems reasonable, since there aren't many industries besides automobiles where you can do such huge volume on products that cost tens of thousands of dollars each. And then someone's got to fuel all those cars.